ATOMIC & NUCLEAR PHYSICS PARTICLE PHYSICS UNITS ELECTRICITY & MAGNETISM A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site electron volt (eV) A unit of energy equal to the amount of kinetic energy an electron gains after being accelerated through an electric potential of 1 volt. It can also be used as a unit of mass by applying Einstein's relation E = mc2. For example, the mass of the proton is 938.256 × 106 eV (938.256 MeV). Chemically, for 1 mole of electrons 1 eV ~ 100 kJ mol-1 (96.49 kJ mol-1). One electron volt is roughly half the energy carried by a single photon of red light. The minimum amount of energy needed to ionize hydrogen from its ground state is 13.6 eV. The larger units MeV (= 106 eV), GeV (= 109 eV), and TeV (= 1012 eV) are also used. Related categories    • ATOMIC AND NUCLEAR PHYSICS    • PARTICLE PHYSICS    • ELECTRICITY AND MAGNETISM    • UNITS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP