In physics and chemistry, the Faraday constant is the amount of electric charge in one mole of electrons. The Faraday constant was named after British scientist Michael Faraday. It is used in electrolytic system calculations to determine the mass of a chemical species that will collect at an electrode. A black hole concept drawing by NASA. Physics (from the Greek, φυσικός (physikos), natural, and φύσις (physis), nature) is the science of the natural world dealing with the fundamental constituents of the universe, the forces they exert on one another, and the results produced by these forces. ... Chemistry (derived from the Arabic word kimia, alchemy, where al is Arabic for the) is the science that deals with the properties of organic and inorganic substances and their interactions with other organic and inorganic substances. ... Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interactions. ... The mole (symbol: mol) is the SI term identifying the number of particles in a given amount of matter. ... Properties The electron is a fundamental subatomic particle which carries a negative electric charge. ... Michael Faraday Michael Faraday, FRS (September 22, 1791 – August 25, 1867) was a British scientist (a physicist and chemist) who contributed significantly to the fields of electromagnetism and electrochemistry. ...

It has the symbol F, and is given by

,

where N_A is Avogadro's number (approximately 6.02 x 10²³ mole^-1) and q is the magnitude of the charge on an electron (approximately 1.602 x 10⁻¹⁹ coulombs per electron). Avogadros number, also called Avogadros Constant (NA) is a large constant used in chemistry and physics. ... The elementary charge (symbol e or sometimes q) is the electric charge carried by a single proton, or equivalently, the negative of the electric charge carried by a single electron. ... Properties The electron is a fundamental subatomic particle which carries a negative electric charge. ... The coulomb (symbol: C) is the SI unit of electric charge. ...

The value of F was first determined by weighing the amount of silver deposited in an electrochemical reaction in which a measured current was passed for a measured time. This value was used to calculate Avogadro's number. Research is continuing into more accurate ways of determining F, and thereby N_A. There are plans to use this value to redefine the kilogram in terms of a known number of atoms. [Source: NPL Annual Review 1999] General Name, Symbol, Number silver, Ag, 47 Chemical series transition metals Group, Period, Block 11, 5, d Appearance lustrous white metal Atomic mass 107. ... In electricity, current refers to electric current, which is the flow of electric charge. ... A watch Attempting to understand time has long been a prime occupation for philosophers, scientists and artists. ... The neutrality of this article is disputed. ... Properties An atom (Greek άτομον from ά: non and τομον: divisible) is a submicroscopic structure found in all ordinary matter. ... The National Physical Laboratory (NPL) is the national measurement standards laboratory for the United Kingdom, based at Bushy Park in Teddington, near London. ...

F = 96 485.3383 coulomb/mole

Source: Peter J. Mohr and Barry N. Taylor, CODATA Recommended Values of the Fundamental Physical Constants: 2002, published in Rev. Mod. Phys. vol. 77(1) 1-107 (2005).

See also

• Faraday's law of electrolysis
• Michael Faraday