s19e19j21 s19e19j21
  • 30-09-2021
  • Biology
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If a rock contains 75% of the decay product, how many half-lives have passed

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hartfox1234
hartfox1234 hartfox1234
  • 30-09-2021

two half-lives

if a life contains 25percent of a parent isotope and 75 percent of it's daughter isotope, two half-lives must have passed

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