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'''Electron-Volts''' is a unit of energy equal to that attained by an [[electron]] falling unimpeded through a potential difference of one [[volt]]. It is commonly abbreviated as eV. One electron-Volt is equal to <math>1.602\times10^{-19}</math> [[Joule#Joule|Joule]].
'''Electron-Volts''' are a unit of [[energy]] equal to that attained by an [[electron]] falling unimpeded through a [[voltage|potential difference]] of one [[volt]].<ref>[https://www.britannica.com/science/electron-volt Electron volt] from britannica.com</ref> One electron-Volt is equal to 1.602×10<sup>-19</sup> [[Joule#Joule|Joules]]. It is commonly abbreviated as eV and standard prefixes are used to denote larger or smaller quantities, e.g. 1 MeV = 1 million electron-volts.
The units is commonly used in atomic, nuclear and particle physics due to the small energies encountered. For example, the [[ionization energy]] of [[hydrogen]] is 13.6 eV and the energy of a typical [[alpha particle]] is 2-10 MeV.<ref name=hyperphysics>[http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ev.html Energies in Electron Volts] from hyperphysics.phy-astr.gsu.edu</ref>
==References==
{{reflist}}
[[Category:Electricity]]
[[Category:Electricity]]
[[Category:Physics]]
[[Category:Physics]]