proton A proton is a stable subatomic particle, symbol , Hydron (chemistry), H+, or 1H+ with a positive electric charge of +1 ''e'' (elementary charge). Its mass is slightly less than the mass of a neutron and approximately times the mass of an e ...

is a subatomic particle. Proton may also refer to:

In chemistry

* Proton, the

hydron In chemistry, the hydron, informally called proton, is the cationic form of atomic hydrogen, represented with the symbol . The general term "hydron", endorsed by IUPAC, encompasses cations of hydrogen regardless of isotope: thus it refers collec ...

ion (notated ) * Proton,

hydronium In chemistry, hydronium (hydroxonium in traditional British English) is the cation , also written as , the type of oxonium ion produced by protonation of water. It is often viewed as the positive ion present when an Arrhenius acid is dissolved ...

(also called hydroxonium) ion (notated ) *

Proton-pump inhibitor Proton-pump inhibitors (PPIs) are a class of medications that cause a profound and prolonged reduction of gastric acid, stomach acid production. They do so by irreversibly inhibiting the stomach's H+/K+ ATPase, H+/K+ ATPase proton pump. The body ...

, a group of drugs *

Proton conductor A proton conductor is an electrolyte, typically a solid electrolyte, in which H+ are the primary charge carriers. Composition Acid solutions exhibit proton-conductivity, while pure proton conductors are usually dry solids. Typical materials a ...

, an electrolyte * Proton-coupled electron transfer, a chemical reaction mechanism * Proton spectrum, the

nuclear magnetic resonance Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are disturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a ...

spectrum of the ¹H nucleus

In sports and entertainment

Proton Competition Proton Competition (also formerly racing as Dempsey-Proton Racing or Team Felbermayr-Proton) is a German auto racing team based in Ummendorf, Baden-Württemberg. It was founded by Gerold Ried, and is currently owned by his son Christian Ried. Th ...

, a German auto racing team * Proton F.C., football club in the Malaysian Premier League sponsored by the carmaker that existed between 1986 and 2009 * Proton Radio, an internet electronic music station

In technology

* Ozone Proton, a French paraglider design * Protei-5 Russian diver propulsion vehicle called a "Proton", Russian diver propulsion vehicle *

Proton (rocket family) Proton (, formal designation: UR-500) is an expendable launch system used for both commercial and Russian government space launches. The first Proton rocket was launched in 1965. Modern versions of the launch system are still in use , making it ...

, Russian uncrewed space vehicle design **

Proton-K The Proton-K, also designated Proton 8K82K after its GRAU index or SL-12 after its model number, was a Russian, previously Soviet, carrier rocket derived from the earlier Proton. It was built by Khrunichev, and launched from sites 81/23, 8 ...

, a rocket **

Proton-M The Proton-M, (Протон-М) GRAU index 8K82M or , is an Expendable launch system, expendable Russian heavy-lift launch vehicle derived from the Soviet Union, Soviet-developed Proton (rocket family), Proton. It is built by Khrunichev State R ...

, a rocket * Proton satellite, Soviet satellite *

Proton-transfer-reaction mass spectrometry Proton-transfer-reaction mass spectrometry (PTR-MS) is an analytical chemistry technique that uses gas phase hydronium ion, hydronium reagent ions which are produced in an ion source. PTR-MS is used for online monitoring of Volatile organic compoun ...

, a technique to monitor volatile organic compounds online *

Proton (software) Proton is a compatibility layer that allows Windows software (primarily video games) to run on Linux-based operating systems. Proton is developed by Valve in cooperation with developers from CodeWeavers. It is a collection of software and libr ...

, a Wine-based compatibility tool for Linux * Products of the company

Proton AG Proton AG is a Switzerland, Swiss technology company offering privacy-focused online services and software. It is majority owned by the non-profit Proton Foundation. Products In May 2022, Proton updated the visuals, user interface, and log ...

Proton Mail Proton Mail is a Swiss end-to-end encrypted email service launched in 2014 and operated by Proton AG, which also operates Proton VPN, Proton Drive, Proton Calendar, Proton Pass and Proton Wallet. Proton AG is owned by the nonprofit Proton ...

, an encrypted email service **

Proton VPN Proton VPN is a VPN service launched in 2017 and operated by the Swiss company Proton AG, the company behind the email service Proton Mail. According to its official website, Proton VPN and Proton Mail share the same management team, offices, an ...

, an encrypted VPN service **

Proton Pass Proton Pass is a freemium password manager developed by the Swiss software company Proton AG. Overview Proton Pass can store login credentials, Email alias, email aliases, credit card data, Passkeys (authentication), passkeys, Multi-factor a ...

, an encrypted password manager **

Proton Drive Proton Drive is an end-to-end encrypted, cloud-based file storage and synchronization service developed by Proton AG. Proton Drive enables storing files in the cloud, synchronizing files across devices, and sharing files securely. It is accessi ...

, an encrypted cloud storage service **

Proton Calendar Proton AG is a Swiss technology company offering privacy-focused online services and software. It is majority owned by the non-profit Proton Foundation. Products In May 2022, Proton updated the visuals, user interface, and logos of all its ...

, an encrypted digital calendar ** Proton Wallet, an encrypted digital wallet ** Proton docs, an encrypted document writing tool * Original name of the

BBC Micro The BBC Microcomputer System, or BBC Micro, is a family of microcomputers developed and manufactured by Acorn Computers in the early 1980s as part of the BBC's Computer Literacy Project. Launched in December 1981, it was showcased across severa ...

microcomputer * Proton, a model of diving equipment made by

Siebe Gorman Siebe Gorman & Company Ltd was a British company that developed diving equipment and breathing equipment and worked on commercial diving and marine salvage projects. The company advertised itself as 'Submarine Engineers'. It was founded by Augu ...

In business

, a Swiss company offering privacy-focused online services * Proton (debit card), a discontinued electronic debit card from Belgium * Proton Bank, an investment bank in Greece * Proton Electronic, a Taiwanese manufacturer of consumer audio and video equipment founded in 1964 *

Proton Holdings Proton Holdings Berhad, commonly known as Proton (stylised PROTON), is a Malaysian multinational Automotive industry, automotive company. Proton was established on 7 May 1983, as Malaysia's sole national budget car company until the advent o ...

, a Malaysian car producer

Other uses

* USS ''Proton'' (AG-147), a US Navy tank landing ship * Professor Proton, a fictional scientist in ''The Big Bang Theory'' television series universe * Proton (band), an Australian rock band

In chemistry

In sports and entertainment

In technology

In business

Other uses

See also