Electronvolt
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The electronvolt (symbol: eV) is a non-SI unit of energy. It is defined as the kinetic energy gained by an electron on being accelerated through a potential difference of one volt: as such, its value in SI units is determined by the measured value of the elementary charge. The 2006 CODATA recommended value is 1 eV = 1.602 176 487(40) × 10−19 J.[1]
In chemistry, it is often useful to express the electronvolt as a molar quantity, whose value in SI units is determined by the measured value of the Faraday constant. The 2006 CODATA recommended value is 1 eV = 96.485 3399(24) kJ mol−1.
In particle physics, it is also used as a unit of mass.
References
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