isabelcamacho7083 isabelcamacho7083
  • 16-07-2018
  • Chemistry
contestada

Radioactive isotope has a half-life of 1.2 billion years. as measured by the presence of the isotope and its stable decay product, a rock originally contained 10 grams of the radioactive isotope, and now contains 1.25 grams. approximately how many years old is the rock?

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agorgeouslady
agorgeouslady agorgeouslady
  • 19-07-2018
the radioactive isotope is 15 years old
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