Consider 100 g of 252Fm, which decays in a sequence of five α decays to eventually reach 232Th. (a) How much of the original sample is 252Fm, and how much is 248Cf after one day? (b) After one month? (c) Explain why it is mostly curium after 5 years. (d) What isotope is it mostly after 100 years? (e) Approximate how much time it will take for the sample to be mostly thorium.
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