| unit of energy equal to the difference in potential energy of an electron in two positions with electric potential difference of one volt NOTE 1 Electronvolt is often defined as the kinetic energy acquired by an electron in passing through an electric potential difference of 1 V in vacuum. NOTE 2 1 eV = 1,602 176 487(40) × 10−19 J (CODATA 2006). The electronvolt is accepted for use with the SI and is often combined with the SI prefixes.
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