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This is a list of the 118
chemical element A chemical element is a species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species. Unlike chemical compounds, chemical elements cannot be broken down into simpler sub ...
s which have been identified as of 2022. A chemical element, often simply called an element, is a type of
atom Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The nucleus is made of one or more protons and a number of neutrons. Only the most common variety of hydrogen has no neutrons. Every solid, liquid, gas, ...
which has the same number of protons in its
atomic nucleus The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment. After the discovery of the neutron ...
(i.e., the same
atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...
, or ''Z''). The definitive visualisation of all 118 elements is the periodic table of the elements, whose
history History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well ...
along the principles of the
periodic law Periodic trends are specific patterns that are present in the periodic table that illustrate different aspects of a certain element. They were discovered by the Russian chemist Dmitri Mendeleev in the year 1863. Major periodic trends include atom ...
was one of the founding developments of modern chemistry. It is a tabular arrangement of the elements by their chemical properties that usually uses abbreviated
chemical symbols A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., wit ...
in place of full element names, but the linear list format presented here is also useful. Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as
atomic weight Relative atomic mass (symbol: ''A''; sometimes abbreviated RAM or r.a.m.), also known by the deprecated synonym atomic weight, is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a giv ...
,
density Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematical ...
, and
electronegativity Electronegativity, symbolized as , is the tendency for an atom of a given chemical element to attract shared electrons (or electron density) when forming a chemical bond. An atom's electronegativity is affected by both its atomic number and the ...
. For more detailed information about the origins of element names, see
List of chemical element name etymologies This article lists the etymology of chemical elements of the periodic table. History Throughout the history of chemistry, several chemical elements have been discovered. In the nineteenth century, Dmitri Mendeleev formulated the periodic tabl ...
.


List


See also

* List of people whose names are used in chemical element names * List of places used in the names of chemical elements *
List of chemical element name etymologies This article lists the etymology of chemical elements of the periodic table. History Throughout the history of chemistry, several chemical elements have been discovered. In the nineteenth century, Dmitri Mendeleev formulated the periodic tabl ...
*
Roles of chemical elements This table is designed to show the role(s) performed by each chemical element, in nature and in technology. Z = Atomic numberSym. = SymbolPer. = PeriodGr. = Group {, class="wikitable sortable" ! Z ! Sym. ! Element ! Per. ! Gr. ! Role(s) in nature ...


References


External links


Atoms made thinkable
an interactive visualisation of the elements allowing physical and chemical properties to be compared
Top 50 Elements
a quiz on the chemical symbols of the top 50 elements in the periodic table {{Navbox periodic table