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Most of the isotopes with atomic mass numbers below 69 decay to isotopes of zinc, while most of the isotopes with masses above 71 decay to isotopes of germanium. Among them, the most commercially important radioisotopes are gallium-67 and gallium-68.
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%.
Spectral lines of gallium: ... 69 Ga 60.1% stable: 70 Ga synth ... mass number comment: mass number comment: no description. Unknown: optional: abundance:
This page uses the meta infobox {{Infobox isotopes (meta)}} for the element isotopes infobox.. This infobox contains the table of § Main isotopes, and the § Standard atomic weight.
Gallium 31 Ga 69.723: ... the mass number of the most stable known isotope is used instead. Other tables may include properties such as state of matter, melting and ...
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Gallium: Germanium: Arsenic: ... show increasing reactivity as the elements get heavier in atomic mass and higher in atomic number. ... 27 Al, 69 Ga and 71 Ga ...