rellik moowow. each element is of course unique, but as the lightest metal, lithium's abundance & uses, both chemically & physically, have in recent years really piqued my interest as I learn more about it.
turns out, in the context of its use as fusion fuel, confusion about the role of lithium-7 elevated the Castle Bravo test to be even more of a specific tragedy than the background tragedy of nuclear weapons development and testing more generally
Natural lithium is a mixture of lithium-6 and lithium-7 isotopes (with 7.5% of the former). The enriched lithium used in Bravo was nominally 40% lithium-6 (the remainder was the much more common lithium-7, which was incorrectly assumed to be inert).
from
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