electron volt (eV)
The electron volt 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
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