jcrist6397 jcrist6397
  • 26-07-2017
  • Chemistry
contestada

If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is ___________ years old

Respuesta :

tc6898 tc6898
  • 27-07-2017
25% remaining = 40,000 years old
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