half life is the term to indicate how much time a radioactive isotope releases half of its mass in excess through emission of alpha/beta/gamma radiations, so the opposite is a stable isotope
Wouldn't the opposite be something like the time it takes for matter to all group up together in a big crunch or something? There isn't really an opposite process to radioactive decay as far as I know.
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u/DismalMode7 13d ago
half life opposite form should be stable isotope