Editing Gallium (section)

===Isotopes===
{{Main|Isotopes of gallium}}
Gallium has 30 known isotopes, ranging in [[mass number]] from 60 to 89. Only two isotopes are stable and occur naturally, gallium-69 and gallium-71. Gallium-69 is more abundant: it makes up about 60.1% of natural gallium, while gallium-71 makes up the remaining 39.9%. All the other isotopes are radioactive, with gallium-67 being the longest-lived (half-life 3.261&nbsp;days). Isotopes lighter than gallium-69 usually decay through [[beta plus decay]] (positron emission) or [[electron capture]] to isotopes of [[zinc]], while isotopes heavier than gallium-71 decay through [[beta minus decay]] (electron emission), possibly with delayed [[neutron emission]], to isotopes of [[germanium]]. Gallium-70 can decay through both beta minus decay and electron capture. Gallium-67 is unique among the light isotopes in having only electron capture as a decay mode, as its decay energy is not sufficient to allow positron emission.<ref name="Audi">{{NUBASE 2003}}</ref> Gallium-67 and [[gallium-68]] (half-life 67.7&nbsp;min) are both used in [[nuclear medicine]].