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==Key Stage 5==
[[File:FeynmanDiagramElectronCapture.png|right|300px|thumb|This is a '''Feynman diagram''' showing '''Electron capture''' due to the [[Weak Nuclear Interaction|weak interaction]] in which a [[proton]] [[Electron Capture|captures]] an [[electron]] to become a [[neutron]].]]
===Meaning===
'''Electron capture''' is a process in which a [[Proton-rich Nucleus|proton-rich nucleus]] absorbs an [[Inner Shell|inner-shell]] [[electron]], causing a [[proton]] to transmute into a [[neutron]] and [[emit]]ting a [[neutrino]].