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Sublime74
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Homework Statement
A sample of radioactive isotopes contains two different nuclides, labeled A and B. Initially, the sample composition is 1:1, i.e., the same number of nuclei A as nuclei B. The half-life of A is 2 hours and, that of B, 4 hours. What is the expected ratio A/B after 8 hours?
Homework Equations
3. The attempt a solution
I know the number of nuclei decreases by a factor of 2 for each half life elapsed, but not sure how to go about this problem...