If the number of nuclei in a radioactive sample at a given time is N, what will be the number at the end of two half-lives?

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KollegeApply · Accepted Answer

N/4 Explanation: The number of nuclei in a radioactive sample at a given time is N. After the first half-life the remaining nuclei are, N/2 After the second half-life the remaining nuclei are, (N/2)/2 = N/4

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