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The following outline acts as an overview of and topical guide to chemistry:
Chemistry Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and chemical compound, compounds made of atoms, molecules a ...
is the
science Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. Modern science is typically divided into twoor threemajor branches: the natural sciences, which stu ...
of atomic
matter In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms, which are made up of interacting subatomic pa ...
(matter that is composed of
chemical element A chemical element is a chemical substance whose atoms all have the same number of protons. The number of protons is called the atomic number of that element. For example, oxygen has an atomic number of 8: each oxygen atom has 8 protons in its ...
s), especially its
chemical reaction A chemical reaction is a process that leads to the chemistry, chemical transformation of one set of chemical substances to another. When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an Gibbs free energy, ...
s, but also including its properties, structure, composition, behavior, and changes as they relate to the chemical reactions. Chemistry is centrally concerned with atoms and their interactions with other atoms, and particularly with the properties of
chemical bond A chemical bond is the association of atoms or ions to form molecules, crystals, and other structures. The bond may result from the electrostatic force between oppositely charged ions as in ionic bonds or through the sharing of electrons a ...
s.


Summary

Chemistry can be described as all of the following: * An
academic discipline An academic discipline or academic field is a subdivision of knowledge that is taught and researched at the college or university level. Disciplines are defined (in part) and recognized by the academic journals in which research is published, a ...
– one with academic departments, curricula and degrees; national and international societies; and specialized journals. * A scientific field (a branch of
science Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. Modern science is typically divided into twoor threemajor branches: the natural sciences, which stu ...
) – widely recognized category of specialized expertise within science, and typically embodies its own terminology and nomenclature. Such a field will usually be represented by one or more scientific journals, where peer-reviewed research is published. There are several chemistry-related scientific journals. ** A
natural science Natural science or empirical science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer ...
– one that seeks to elucidate the rules that govern the natural world using
empirical Empirical evidence is evidence obtained through sense experience or experimental procedure. It is of central importance to the sciences and plays a role in various other fields, like epistemology and law. There is no general agreement on how t ...
and
scientific method The scientific method is an Empirical evidence, empirical method for acquiring knowledge that has been referred to while doing science since at least the 17th century. Historically, it was developed through the centuries from the ancient and ...
. *** A physical science – one that studies non-living systems. *** A biological science – one that studies the role of chemicals and chemical processes in living organisms. ''See Outline of biochemistry.''


Branches

*
Physical chemistry Physical chemistry is the study of macroscopic and microscopic phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mech ...
– study of the physical and fundamental basis of chemical systems and processes. In particular, the energetics and dynamics of such systems and processes are of interest to physical chemists. Important areas of study include
chemical thermodynamics Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measure ...
,
chemical kinetics Chemical kinetics, also known as reaction kinetics, is the branch of physical chemistry that is concerned with understanding the rates of chemical reactions. It is different from chemical thermodynamics, which deals with the direction in which a ...
,
electrochemistry Electrochemistry is the branch of physical chemistry concerned with the relationship between Electric potential, electrical potential difference and identifiable chemical change. These reactions involve Electron, electrons moving via an electronic ...
,
statistical mechanics In physics, statistical mechanics is a mathematical framework that applies statistical methods and probability theory to large assemblies of microscopic entities. Sometimes called statistical physics or statistical thermodynamics, its applicati ...
,
spectroscopy Spectroscopy is the field of study that measures and interprets electromagnetic spectra. In narrower contexts, spectroscopy is the precise study of color as generalized from visible light to all bands of the electromagnetic spectrum. Spectro ...
, and more recently,
astrochemistry Astrochemistry is the study of the abundance and reactions of molecules in the universe, and their interaction with radiation. The discipline is an overlap of astronomy and chemistry. The word "astrochemistry" may be applied to both the Solar Syst ...
. Physical chemistry has large overlap with molecular physics. Physical chemistry involves the use of
infinitesimal calculus Calculus is the mathematical study of continuous change, in the same way that geometry is the study of shape, and algebra is the study of generalizations of arithmetic operations. Originally called infinitesimal calculus or "the calculus of ...
in deriving equations. It is usually associated with
quantum chemistry Quantum chemistry, also called molecular quantum mechanics, is a branch of physical chemistry focused on the application of quantum mechanics to chemical systems, particularly towards the quantum-mechanical calculation of electronic contributions ...
and theoretical chemistry. Physical chemistry is a distinct discipline from chemical physics, but again, there is very strong overlap. **
Chemical kinetics Chemical kinetics, also known as reaction kinetics, is the branch of physical chemistry that is concerned with understanding the rates of chemical reactions. It is different from chemical thermodynamics, which deals with the direction in which a ...
– study of rates of chemical processes. ** Chemical physics – investigates physicochemical phenomena using techniques from atomic and molecular physics and condensed matter physics; it is the branch of physics that studies chemical processes. **
Electrochemistry Electrochemistry is the branch of physical chemistry concerned with the relationship between Electric potential, electrical potential difference and identifiable chemical change. These reactions involve Electron, electrons moving via an electronic ...
– branch of chemistry that studies chemical reactions which take place in a solution at the interface of an electron conductor (the electrode: a metal or a semiconductor) and an ionic conductor (the electrolyte), and which involve electron transfer between the electrode and the electrolyte or species in solution. ** Femtochemistry – area of physical chemistry that studies chemical reactions on extremely short timescales, approximately 10−15 seconds (one femtosecond). **
Geochemistry Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the e ...
– chemical study of the mechanisms behind major systems studied in geology. ** Photochemistry – study of chemical reactions that proceed with the absorption of light by atoms or molecules. **
Quantum chemistry Quantum chemistry, also called molecular quantum mechanics, is a branch of physical chemistry focused on the application of quantum mechanics to chemical systems, particularly towards the quantum-mechanical calculation of electronic contributions ...
– branch of chemistry whose primary focus is the application of quantum mechanics in physical models and experiments of chemical systems. ** Solid-state chemistry – study of the synthesis, structure, and properties of solid phase materials, particularly, but not necessarily exclusively of, non-molecular solids. **
Spectroscopy Spectroscopy is the field of study that measures and interprets electromagnetic spectra. In narrower contexts, spectroscopy is the precise study of color as generalized from visible light to all bands of the electromagnetic spectrum. Spectro ...
– study of the interaction between matter and radiated energy. **
Stereochemistry Stereochemistry, a subdiscipline of chemistry, studies the spatial arrangement of atoms that form the structure of molecules and their manipulation. The study of stereochemistry focuses on the relationships between stereoisomers, which are defined ...
– study of the relative spatial arrangement of atoms that form the structure of molecules **
Surface science Surface science is the study of physical and chemical phenomena that occur at the interface of two phases, including solid–liquid interfaces, solid– gas interfaces, solid– vacuum interfaces, and liquid– gas interfaces. It includes the ...
– study of physical and chemical phenomena that occur at the interface of two phases, including solid–liquid interfaces, solid–gas interfaces, solid–vacuum interfaces, and liquid-gas interfaces. ** Thermochemistry – the branch of chemistry that studies the relation between chemical action and the amount of heat absorbed or generated. ***
Calorimetry In chemistry and thermodynamics, calorimetry () is the science or act of measuring changes in '' state variables'' of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reac ...
– the study of heat changes in physical and chemical processes. *
Organic chemistry Organic chemistry is a subdiscipline within chemistry involving the science, scientific study of the structure, properties, and reactions of organic compounds and organic matter, organic materials, i.e., matter in its various forms that contain ...
( outline) – study of the structure, properties, composition, mechanisms, and reactions of
organic compound Some chemical authorities define an organic compound as a chemical compound that contains a carbon–hydrogen or carbon–carbon bond; others consider an organic compound to be any chemical compound that contains carbon. For example, carbon-co ...
s. An organic compound is defined as any compound based on a carbon skeleton. **
Biochemistry Biochemistry, or biological chemistry, is the study of chemical processes within and relating to living organisms. A sub-discipline of both chemistry and biology, biochemistry may be divided into three fields: structural biology, enzymology, a ...
– study of the chemicals,
chemical reaction A chemical reaction is a process that leads to the chemistry, chemical transformation of one set of chemical substances to another. When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an Gibbs free energy, ...
s and chemical interactions that take place in living
organism An organism is any life, living thing that functions as an individual. Such a definition raises more problems than it solves, not least because the concept of an individual is also difficult. Many criteria, few of them widely accepted, have be ...
s. Biochemistry and organic chemistry are closely related, as in
medicinal chemistry Medicinal or pharmaceutical chemistry is a scientific discipline at the intersection of chemistry and pharmacy involved with drug design, designing and developing pharmaceutical medication, drugs. Medicinal chemistry involves the identification, ...
or neurochemistry. Biochemistry is also associated with
molecular biology Molecular biology is a branch of biology that seeks to understand the molecule, molecular basis of biological activity in and between Cell (biology), cells, including biomolecule, biomolecular synthesis, modification, mechanisms, and interactio ...
and
genetics Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinians, Augustinian ...
. *** Neurochemistry – study of neurochemicals; including transmitters, peptides, proteins, lipids, sugars, and nucleic acids; their interactions, and the roles they play in forming, maintaining, and modifying the nervous system. ***Molecular biochemistry and
genetic engineering Genetic engineering, also called genetic modification or genetic manipulation, is the modification and manipulation of an organism's genes using technology. It is a set of Genetic engineering techniques, technologies used to change the genet ...
– an area of biochemistry and molecular biology that studies the genes, their heritage and their expression. ** Bioorganic chemistry – combines organic chemistry and biochemistry toward biology. **
Biophysical chemistry Biophysical chemistry is a physical science that uses the concepts of physics and physical chemistry for the study of biological systems. The most common feature of the research in this subject is to seek an explanation of the various phenomena ...
– is a physical science that uses the concepts of physics and physical chemistry for the study of biological systems. **
Medicinal chemistry Medicinal or pharmaceutical chemistry is a scientific discipline at the intersection of chemistry and pharmacy involved with drug design, designing and developing pharmaceutical medication, drugs. Medicinal chemistry involves the identification, ...
– discipline which applies chemistry for medical or drug related purposes. **
Organometallic chemistry Organometallic chemistry is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkali, alkaline earth, and transition metals, and so ...
– is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkaline, alkaline earth, and transition metals, and sometimes broadened to include metalloids like boron, silicon, and tin. **
Physical organic chemistry Physical organic chemistry, a term coined by Louis Hammett in 1940, refers to a discipline of organic chemistry that focuses on the relationship between chemical structures and chemical reaction, reactivity, in particular, applying experimental to ...
– study of the interrelationships between structure and reactivity in organic molecules. *
Inorganic chemistry Inorganic chemistry deals with chemical synthesis, synthesis and behavior of inorganic compound, inorganic and organometallic chemistry, organometallic compounds. This field covers chemical compounds that are not carbon-based, which are the subj ...
– study of the properties and reactions of inorganic compounds. The distinction between organic and inorganic disciplines is not absolute and there is much overlap, most importantly in the sub-discipline of
organometallic chemistry Organometallic chemistry is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkali, alkaline earth, and transition metals, and so ...
. ** Bioinorganic chemistry – is a field that examines the role of metals in biology. ** Cluster chemistry – focuses on crystalline materials most often existing on the 0–2 nanometer scale and characterizing their crystal structures and understanding their role in the nucleation and growth mechanisms of larger materials. * Nuclear chemistry – study of how subatomic particles come together and make nuclei. Modern transmutation is a large component of nuclear chemistry, and the table of nuclides is an important result and tool for this field. *
Analytical chemistry Analytical skill, Analytical chemistry studies and uses instruments and methods to Separation process, separate, identify, and Quantification (science), quantify matter. In practice, separation, identification or quantification may constitute t ...
– analysis of material samples to gain an understanding of their
chemical composition A chemical composition specifies the identity, arrangement, and ratio of the chemical elements making up a compound by way of chemical and atomic bonds. Chemical formulas can be used to describe the relative amounts of elements present in a com ...
and
structure A structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized. Material structures include man-made objects such as buildings and machines and natural objects such as ...
. Analytical chemistry incorporates standardized experimental methods in chemistry. These methods may be used in all subdisciplines of chemistry, excluding purely theoretical chemistry. Other *
Astrochemistry Astrochemistry is the study of the abundance and reactions of molecules in the universe, and their interaction with radiation. The discipline is an overlap of astronomy and chemistry. The word "astrochemistry" may be applied to both the Solar Syst ...
– study of the abundance and reactions of chemical elements and molecules in the universe, and their interaction with radiation. ** Cosmochemistry – study of the chemical composition of matter in the universe and the processes that led to those compositions. * Computational chemistry – is a branch of chemistry that uses computer simulations for solving chemical problems. *
Environmental chemistry Environmental chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places. It should not be confused with green chemistry, which seeks to reduce potential pollution at its source. It can be defined as ...
– study of chemical and biochemical phenomena that occur diverse aspects of the environment such the air, soil, and water. It also studies the effects of human activity on the environment. *
Green chemistry Green chemistry, similar to sustainable chemistry or circular chemistry, is an area of chemistry and chemical engineering focused on the design of products and processes that minimize or eliminate the use and generation of hazardous substances. Wh ...
is a philosophy of chemical research and engineering that encourages the design of products and processes that minimize the use and generation of hazardous substances. *
Supramolecular chemistry Supramolecular chemistry refers to the branch of chemistry concerning Chemical species, chemical systems composed of a integer, discrete number of molecules. The strength of the forces responsible for spatial organization of the system range from w ...
– refers to the domain of chemistry beyond that of molecules and focuses on the chemical systems made up of a discrete number of assembled molecular subunits or components. * Theoretical chemistry – study of chemistry via fundamental theoretical reasoning (usually within
mathematics Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many ar ...
or
physics Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge whi ...
). In particular the application of
quantum mechanics Quantum mechanics is the fundamental physical Scientific theory, theory that describes the behavior of matter and of light; its unusual characteristics typically occur at and below the scale of atoms. Reprinted, Addison-Wesley, 1989, It is ...
to chemistry is called
quantum chemistry Quantum chemistry, also called molecular quantum mechanics, is a branch of physical chemistry focused on the application of quantum mechanics to chemical systems, particularly towards the quantum-mechanical calculation of electronic contributions ...
. Since the end of the
Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, the development of computers has allowed a systematic development of computational chemistry, which is the art of developing and applying
computer program A computer program is a sequence or set of instructions in a programming language for a computer to Execution (computing), execute. It is one component of software, which also includes software documentation, documentation and other intangibl ...
s for solving chemical problems. Theoretical chemistry has large overlap with (theoretical and experimental)
condensed matter physics Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter, especially the solid and liquid State of matter, phases, that arise from electromagnetic forces between atoms and elec ...
and molecular physics. *
Polymer chemistry Polymer chemistry is a sub-discipline of chemistry that focuses on the structures, chemical synthesis, and chemical and physical properties of polymers and macromolecules. The principles and methods used within polymer chemistry are also applic ...
– multidisciplinary science that deals with the chemical synthesis and chemical properties of polymers or macromolecules. * Wet chemistry – is a form of analytical chemistry that uses classical methods such as observation to analyze materials usually in liquid phase. * Agrochemistry – study and application of both chemistry and biochemistry for agricultural production, the processing of raw products into foods and beverages, and
environmental monitoring Environmental monitoring is the processes and activities that are done to characterize and describe the state of the environment. It is used in the preparation of environmental impact assessments, and in many circumstances in which human activit ...
and remediation. * Atmospheric chemistry – branch of atmospheric science which studies the chemistry of the Earth's atmosphere and that of other planets. * Chemical biology – scientific discipline spanning the fields of chemistry and biology and involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to analyze and manipulation of biological systems. * Chemo-informatics – use of computer and informational techniques applied to a range of problems in the field of chemistry. * Flow chemistry – study of chemical reactions in continuous flow, not as stationary batches, in industry and macro processing equipment. *
Immunohistochemistry Immunohistochemistry is a form of immunostaining. It involves the process of selectively identifying antigens in cells and tissue, by exploiting the principle of Antibody, antibodies binding specifically to antigens in biological tissues. Alber ...
– involves the process of detecting antigens (e.g., proteins) in cells of a tissue section by exploiting the principle of antibodies binding specifically to antigens in biological tissues. * Immunochemistry – is a branch of chemistry that involves the study of the reactions and components on the immune system. * Chemical oceanography – study of ocean chemistry: the behavior of the chemical elements within the Earth's oceans. * Mathematical chemistry – area of study engaged in novel applications of mathematics to chemistry. It concerns itself principally with the mathematical modeling of chemical phenomena. * Mechanochemistry – coupling of mechanical and chemical phenomena on a molecular scale. *
Molecular biology Molecular biology is a branch of biology that seeks to understand the molecule, molecular basis of biological activity in and between Cell (biology), cells, including biomolecule, biomolecular synthesis, modification, mechanisms, and interactio ...
– study of interactions between the various systems of a cell. It overlaps with biochemistry. * Petrochemistry – study of the transformation of petroleum and natural gas into useful products or raw materials. * Phytochemistry – study of phytochemicals which come from plants. * Radiochemistry – chemistry of radioactive materials. *
Sonochemistry In chemistry, the study of sonochemistry is concerned with understanding the effect of ultrasound in forming acoustic cavitation in liquids, resulting in the initiation or enhancement of the chemical activity in the solution. Therefore, the chemica ...
– study of effect of sonic waves and wave properties on chemical systems. * Synthetic chemistry – study of chemical synthesis.


History

History of chemistry The history of chemistry represents a time span from ancient history to the present. By 1000 BC, civilizations used technologies that would eventually form the basis of the various branches of chemistry. Examples include the discovery of fire, ex ...
* Precursors to chemistry **
Alchemy Alchemy (from the Arabic word , ) is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. In its Western form, alchemy is first ...
( outline) *** History of alchemy * History of the branches of chemistry ** History of analytical chemistry – history of the study of separation, identification, and quantification of the chemical components of natural and artificial materials. ** History of astrochemistry – history of the study of the abundance and reactions of chemical elements and molecules in the universe, and their interaction with radiation. *** History of cosmochemistry – history of the study of the chemical composition of matter in the universe and the processes that led to those compositions ** History of atmospheric chemistry – history of the branch of atmospheric science in which the chemistry of the Earth's atmosphere and that of other planets is studied. It is a multidisciplinary field of research and draws on environmental chemistry, physics, meteorology, computer modeling, oceanography, geology and volcanology and other disciplines ** History of biochemistry – history of the study of chemical processes in living organisms, including, but not limited to, living matter. Biochemistry governs all living organisms and living processes. *** History of agrochemistry – history of the study of both chemistry and biochemistry which are important in agricultural production, the processing of raw products into foods and beverages, and in environmental monitoring and remediation. *** History of bioinorganic chemistry – history of the examination of the role of metals in biology. *** History of bioorganic chemistry – history of the rapidly growing scientific discipline that combines organic chemistry and biochemistry. *** History of biophysical chemistry – history of the new branch of chemistry that covers a broad spectrum of research activities involving biological systems. ***
History of environmental chemistry History is the systematic study of the past, focusing primarily on the Human history, human past. As an academic discipline, it analyses and interprets evidence to construct narratives about what happened and explain why it happened. Some t ...
– history of the scientific study of the chemical and biochemical phenomena that occur in natural places. *** History of immunochemistry – history of the branch of chemistry that involves the study of the reactions and components of the immune system. *** History of medicinal chemistry – history of the discipline at the intersection of chemistry, especially synthetic organic chemistry, and pharmacology and various other biological specialties, where they are involved with design, chemical synthesis and development for market of pharmaceutical agents (drugs). *** History of natural product chemistry – history of the scientific study of chemical compounds or substances produced by living organisms—history of chemical compounds found in nature that usually have a pharmacological or biological activity for use in pharmaceutical drug discovery and drug design. *** History of neurochemistry – history of the specific study of neurochemicals, which include neurotransmitters and other molecules such as neuro-active drugs that influence neuron function. ** History of computational chemistry – history of the branch of chemistry that uses principles of computer science to assist in solving chemical problems. *** History of chemo-informatics – history of the use of computer and informational techniques, applied to a range of problems in the field of chemistry. *** History of molecular mechanics – history of the uses of Newtonian mechanics to model molecular systems. ** History of flavor chemistry – history of the use of chemistry to engineer artificial and natural flavors. ** History of flow chemistry – history of chemical reactions run in a continuously flowing stream rather than in batch production. ** History of geochemistry – history of the study of the mechanisms behind major geological systems using chemistry *** History of aqueous geochemistry – history of the study of the role of various elements in watersheds, including copper, sulfur, mercury, and how elemental fluxes are exchanged through atmospheric-terrestrial-aquatic interactions *** History of isotope geochemistry – history of the study of the relative and absolute concentrations of the elements and their isotopes using chemistry and geology *** History of ocean chemistry – history of the study the chemistry of marine environments, including the influences of different variables. *** History of organic geochemistry – history of the study of the impacts and processes that organisms have had on Earth *** History of regional, environmental and exploration geochemistry – history of the study of the spatial variation in the chemical composition of materials at the surface of the Earth ** History of inorganic chemistry – history of the branch of chemistry concerned with the properties and behavior of inorganic compounds. ** History of nuclear chemistry – history of the subfield of chemistry dealing with radioactivity, nuclear processes and nuclear properties. *** History of radiochemistry – history of the chemistry of radioactive materials, where radioactive isotopes of elements are used to study the properties and chemical reactions of non-radioactive isotopes (often within radiochemistry the absence of radioactivity leads to a substance being described as being inactive as the isotopes are stable). ** History of organic chemistry – history of the study of the structure, properties, composition, reactions, and preparation (by synthesis or by other means) of carbon-based compounds, hydrocarbons, and their derivatives. *** History of petrochemistry – history of the branch of chemistry that studies the transformation of crude oil (petroleum) and natural gas into useful products or raw materials. ** History of organometallic chemistry – history of the study of chemical compounds containing bonds between carbon and a metal. ** History of photochemistry – history of the study of chemical reactions that proceed with the absorption of light by atoms or molecules. ** History of physical chemistry – history of the study of macroscopic, atomic, subatomic, and particulate phenomena in chemical systems in terms of physical laws and concepts. *** History of chemical kinetics – history of the study of rates of chemical processes. *** History of chemical thermodynamics – history of the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. *** History of electrochemistry – history of the branch of chemistry that studies chemical reactions which take place in a solution at the interface of an electron conductor (a metal or a semiconductor) and an ionic conductor (the electrolyte), and which involve electron transfer between the electrode and the electrolyte or species in solution. *** History of femtochemistry – history of the science that studies chemical reactions on extremely short timescales, approximately 10−15 seconds (one femtosecond, hence the name). *** History of mathematical chemistry – history of the area of research engaged in novel applications of mathematics to chemistry; it concerns itself principally with the mathematical modeling of chemical phenomena. *** History of mechanochemistry – history of the coupling of the mechanical and the chemical phenomena on a molecular scale and includes mechanical breakage, chemical behaviour of mechanically stressed solids (e.g., stress-corrosion cracking), tribology, polymer degradation under shear, cavitation-related phenomena (e.g., sonochemistry and sonoluminescence), shock wave chemistry and physics, and even the burgeoning field of molecular machines. *** History of physical organic chemistry – history of the study of the interrelationships between structure and reactivity in organic molecules. *** History of quantum chemistry – history of the branch of chemistry whose primary focus is the application of quantum mechanics in physical models and experiments of chemical systems. *** History of sonochemistry – history of the study of the effect of sonic waves and wave properties on chemical systems. *** History of stereochemistry – history of the study of the relative spatial arrangement of atoms within molecules. *** History of supramolecular chemistry – history of the area of chemistry beyond the molecules and focuses on the chemical systems made up of a discrete number of assembled molecular subunits or components. *** History of thermochemistry – history of the study of energy and heat associated with chemical reactions and/or physical transformations. ** History of phytochemistry – history of the study of phytochemicals. ** History of polymer chemistry – history of the multidisciplinary science that deals with the chemical synthesis and chemical properties of polymers or macromolecules. ** History of solid-state chemistry – history of the study of the synthesis, structure, and properties of solid phase materials, particularly, but not necessarily exclusively of, non-molecular solids ** History of multidisciplinary fields involving chemistry: *** History of chemical biology – history of the scientific discipline spanning the fields of chemistry and biology that involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to the study and manipulation of biological systems. *** History of chemical oceanography – history of the study of the behavior of chemical elements within the Earth's oceans. *** History of chemical physics – history of the branch of physics that studies chemical processes from the point of view of physics and engineering. *** History of oenology – history of the science and study of all aspects of wine and winemaking except vine-growing and grape-harvesting, which is a subfield called
viticulture Viticulture (, "vine-growing"), viniculture (, "wine-growing"), or winegrowing is the cultivation and harvesting of grapes. It is a branch of the science of horticulture. While the native territory of ''Vitis vinifera'', the common grape vine ...
. *** History of spectroscopy – history of the study of the interaction between matter and radiated energy *** History of surface science – history of the study of physical and chemical phenomena that occur at the interface of two phases, including solid–liquid interfaces, solid–gas interfaces, solid–vacuum interfaces, and liquid–gas interfaces. * History of chemicals ** History of chemical elements *** History of carbon *** History of hydrogen **** Timeline of hydrogen technologies *** History of oxygen ** History of chemical products *** History of aspirin *** History of cosmetics ***
History of gunpowder Gunpowder is the first explosive to have been developed. Popularly listed as one of the "Four Great Inventions" of China, it was invented during the late Tang dynasty (9th century) while the Wujing Zongyao, earliest recorded chemical formula f ...
*** History of pharmaceutical drugs *** History of vitamins * History of chemical processes ** History of manufactured gas *** History of the Haber process * History of the chemical industry ** History of the petroleum industry ** History of the pharmaceutical industry * History of the periodic table


Chemicals

* Dictionary of chemical formulas * List of biomolecules * List of inorganic compounds *
Periodic table The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows (" periods") and columns (" groups"). It is an icon of chemistry and is widely used in physics and other s ...


Atomic theory

Atomic theory Atomic theory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years in response to scientific discoveries. Initially, it referred to a hypothetical concept of ...
* Atomic models **
Atomism Atomism () is a natural philosophy proposing that the physical universe is composed of fundamental indivisible components known as atoms. References to the concept of atomism and its Atom, atoms appeared in both Ancient Greek philosophy, ancien ...
– natural philosophy that theorizes that the world is composed of indivisible pieces. ** Plum pudding model ** Rutherford model **
Bohr model In atomic physics, the Bohr model or Rutherford–Bohr model was a model of the atom that incorporated some early quantum concepts. Developed from 1911 to 1918 by Niels Bohr and building on Ernest Rutherford's nuclear Rutherford model, model, i ...


Thermochemistry

Thermochemistry


Terminology

* Thermochemistry *
Chemical kinetics Chemical kinetics, also known as reaction kinetics, is the branch of physical chemistry that is concerned with understanding the rates of chemical reactions. It is different from chemical thermodynamics, which deals with the direction in which a ...
– the study of the rates of chemical reactions and investigates how different experimental conditions can influence the speed of a chemical reaction and yield information about the reaction's mechanism and
transition state In chemistry, the transition state of a chemical reaction is a particular configuration along the reaction coordinate. It is defined as the state corresponding to the highest potential energy along this reaction coordinate. It is often marked w ...
s, as well as the construction of mathematical models that can describe the characteristics of a chemical reaction. * Exothermic – a process or reaction in which the system releases energy to its surroundings in the form of heat. They are denoted by negative heat flow. * Endothermic – a process or reaction in which the system absorbs energy from its surroundings in the form of heat. They are denoted by positive heat flow. * Thermochemical equation * Enthalpy change – internal energy of a system plus the product of pressure and volume. Its change in a system is equal to the heat brought to the system at constant pressure. * Enthalpy of reaction *
Temperature Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measurement, measured with a thermometer. It reflects the average kinetic energy of the vibrating and colliding atoms making ...
– an objective comparative measure of heat. *
Calorimeter A calorimeter is a device used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. Differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters ...
– an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. * Heat – A form of energy associated with the kinetic energy of atoms or molecules and capable of being transmitted through solid and fluid media by conduction, through fluid media by convection, and through empty space by radiation. *
Joule The joule ( , or ; symbol: J) is the unit of energy in the International System of Units (SI). In terms of SI base units, one joule corresponds to one kilogram- metre squared per second squared One joule is equal to the amount of work d ...
– a unit of energy. *
Calorie The calorie is a unit of energy that originated from the caloric theory of heat. The large calorie, food calorie, dietary calorie, kilocalorie, or kilogram calorie is defined as the amount of heat needed to raise the temperature of one liter o ...
*
Specific heat In thermodynamics, the specific heat capacity (symbol ) of a substance is the amount of heat that must be added to one unit of mass of the substance in order to cause an increase of one unit in temperature. It is also referred to as massic heat ...
*
Specific heat capacity In thermodynamics, the specific heat capacity (symbol ) of a substance is the amount of heat that must be added to one unit of mass of the substance in order to cause an increase of one unit in temperature. It is also referred to as massic heat ...
*
Latent heat Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process—usually a first-order phase transition, like melting or condensation. ...
* Heat of fusion *
Heat of vaporization In thermodynamics, the enthalpy of vaporization (symbol ), also known as the (latent) heat of vaporization or heat of evaporation, is the amount of energy (enthalpy) that must be added to a liquid substance to Phase transition, transform a qua ...
*
Collision theory Collision theory is a principle of chemistry used to predict the rates of chemical reactions. It states that when suitable particles of the Reagent, reactant hit each other with the correct orientation, only a certain amount of collisions result ...
* Activation energy * Activated complex * Reaction rate * Catalyst


Thermochemical equations

* Chemical equations that include the heat involved in a reaction, either on the reactant side or the product side. * Examples: ** H2O(l) + 240kJ → H2O(g) ** N2 + 3H2 → 2NH3 + 92kJ *
Joule The joule ( , or ; symbol: J) is the unit of energy in the International System of Units (SI). In terms of SI base units, one joule corresponds to one kilogram- metre squared per second squared One joule is equal to the amount of work d ...
(J)


Chemists

: ''For more chemists, see: Nobel Prize in Chemistry and List of chemists'' * Amedeo Avogadro * Elias James Corey *
Marie Curie Maria Salomea Skłodowska-Curie (; ; 7 November 1867 – 4 July 1934), known simply as Marie Curie ( ; ), was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity. She was List of female ...
*
John Dalton John Dalton (; 5 or 6 September 1766 – 27 July 1844) was an English chemist, physicist and meteorologist. He introduced the atomic theory into chemistry. He also researched Color blindness, colour blindness; as a result, the umbrella term ...
*
Humphry Davy Sir Humphry Davy, 1st Baronet (17 December 177829 May 1829) was a British chemist and inventor who invented the Davy lamp and a very early form of arc lamp. He is also remembered for isolating, by using electricity, several Chemical element, e ...
* George Eastman *
Michael Faraday Michael Faraday (; 22 September 1791 – 25 August 1867) was an English chemist and physicist who contributed to the study of electrochemistry and electromagnetism. His main discoveries include the principles underlying electromagnetic inducti ...
* Rosalind Franklin * Eleuthère Irénée du Pont * Dmitriy Mendeleyev * Alfred Nobel * Wilhelm Ostwald *
Louis Pasteur Louis Pasteur (, ; 27 December 1822 – 28 September 1895) was a French chemist, pharmacist, and microbiologist renowned for his discoveries of the principles of vaccination, Fermentation, microbial fermentation, and pasteurization, the la ...
*
Linus Pauling Linus Carl Pauling ( ; February 28, 1901August 19, 1994) was an American chemist and peace activist. He published more than 1,200 papers and books, of which about 850 dealt with scientific topics. ''New Scientist'' called him one of the 20 gre ...
*
Joseph Priestley Joseph Priestley (; 24 March 1733 – 6 February 1804) was an English chemist, Unitarian, Natural philosophy, natural philosopher, English Separatist, separatist theologian, Linguist, grammarian, multi-subject educator and Classical libera ...
* Robert Burns Woodward * Karl Ziegler * Ahmed Zewail


Chemistry literature

*
Scientific literature Scientific literature encompasses a vast body of academic papers that spans various disciplines within the natural and social sciences. It primarily consists of academic papers that present original empirical research and theoretical ...
*
Scientific journal In academic publishing, a scientific journal is a periodical publication designed to further the progress of science by disseminating new research findings to the scientific community. These journals serve as a platform for researchers, schola ...
*
Academic journal An academic journal (or scholarly journal or scientific journal) is a periodical publication in which Scholarly method, scholarship relating to a particular academic discipline is published. They serve as permanent and transparent forums for the ...
* List of important publications in chemistry * List of scientific journals in chemistry *
List of science magazines A science magazine is a periodical literature, periodical publication with news, opinions, and reports about science, generally written for a non-expert audience. In contrast, a periodical publication, usually including primary research and/or r ...
*
Scientific American ''Scientific American'', informally abbreviated ''SciAm'' or sometimes ''SA'', is an American popular science magazine. Many scientists, including Albert Einstein and Nikola Tesla, have contributed articles to it, with more than 150 Nobel Pri ...


Lists

; Chemical elements data references *
List of chemical elements 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or ''Z' ...
– atomic mass, atomic number, symbol, name * List of minerals – Minerals * Electron configurations of the elements (data page) – electron configuration, electrons per shell * Densities of the elements (data page) – density (solid, liquid, gas) * Electron affinity (data page) – electron affinity * Melting points of the elements (data page) – melting point * Boiling points of the elements (data page) – boiling point * Critical points of the elements (data page) – critical point * Heats of fusion of the elements (data page) – heat of fusion * Heats of vaporization of the elements (data page) – heat of vaporization * Heat capacities of the elements (data page) – heat capacity * Vapor pressures of the elements (data page) – vapor pressure * Electronegativities of the elements (data page) – electronegativity (Pauling scale) * Ionization energies of the elements (data page) – ionization energies (in eV) and molar ionization energies (in kJ/mol) *
Atomic radii of the elements (data page) The atomic radius of a chemical element is the distance from the center of the nucleus to the outermost shell of an electron. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius ...
– atomic radius (empirical), atomic radius (calculated), van der Waals radius, covalent radius *
Electrical resistivities of the elements (data page) Electrical resistivity References WEL As quoted at http://www.webelements.com/ from these sources: * G.W.C. Kaye and T. H. Laby in ''Tables of physical and chemical constants'', Longman, London, UK, 15th edition, 1993. * A.M. James and M.P. ...
– electrical resistivity * Thermal conductivities of the elements (data page) – thermal conductivity * Thermal expansion coefficients of the elements (data page) – thermal expansion * Speeds of sound of the elements (data page) – speed of sound * Elastic properties of the elements (data page) – Young's modulus, Poisson ratio, bulk modulus, shear modulus * Hardnesses of the elements (data page) – Mohs hardness, Vickers hardness, Brinell hardness * Abundances of the elements (data page) – Earth's crust, sea water, Sun and solar system * List of oxidation states of the elements – oxidation states ; List of compounds * List of CAS numbers by chemical compound * List of Extremely Hazardous Substances * List of inorganic compounds * List of organic compounds * List of alkanes *
List of alloys This is a list of named alloys grouped alphabetically by the metal with the highest percentage. Within these headings, the alloys are also grouped alphabetically. Some of the main alloying elements are optionally listed after the alloy names. Al ...
;Other * List of thermal conductivities * List of purification methods in chemistry * List of unsolved problems in chemistry


See also

* Outline of biochemistry * Outline of physics


References


External links


International Union of Pure and Applied Chemistry

IUPAC Nomenclature Home Page
see especially the "Gold Book" containing definitions of standard chemical terms
/ Chemical energetics
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Chemistry Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and chemical compound, compounds made of atoms, molecules a ...
Chemistry Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and chemical compound, compounds made of atoms, molecules a ...