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Atomic: M.A.C. | Reference
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Isotopes of Lithium
Notable Isotopes
6Li [3 neutrons]
Abundance: 7.5%
Stable with 3 neutrons
Lithium-6 is valued as a source material for tritium (an isotope of hydrogen) production and as a neutron absorber in nuclear fusion.
7Li [4 neutrons]
Abundance: 92.5%
Stable with 4 neutrons
7Li is one of the primordial elements or, more properly, primordial isotopes, produced in Big Bang nucleosynthesis (a small amount of 6Li is also produced in stars).