Chemistry, 05.03.2021 21:50 deaishaajennings123

Potassium- 40 can also be used to date biological fossils since potassium is found living organisms. Potassium-40 has a half- life of 1.28 billion years. Potassium-40 decays to the daughter isotope argon-40. There is 20% of the original potassium-40 remaining. How old is the sample? What type of fossil might this be?

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