christherat77 christherat77
  • 10-10-2020
  • Geography
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How many half-lives have passed when there are three times as much daughter isotope as parent isotope?

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11qq11
11qq11 11qq11
  • 10-10-2020

The ratio of parent to daughter atoms after two half-lives is therefore 1:3 (one-quarter to three-quarters).

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