stefanie331 stefanie331

24-10-2019
Mathematics

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Pd-100 has a half-life of 3.6 days. If one had 620,310,740 atoms at the
start, how many atoms would be present after 21.6 days?

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LammettHash LammettHash

24-10-2019

Notice that 21.6 is 6 times the half-life of Pd-100, which means the amount of atoms is halved 6 times:

620,310,740 / 2^6 = 9,692,355.3125

so about 9,692,355 atoms remain.

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