Biology, 05.05.2020 12:21 amandajbrewerdavis

A scientist is using potassium-40, which is a radioactive isotope of potassium, to find the absolute age of a fossil by radiometric dating. The scientist determines that about three-fourths of the original potassium-40 atoms in the fossil now remain in the fossil.
What additional information is necessary for the scientist to determine the absolute age of the fossil?
A. the total mass of the fossil
B. the atomic mass of potassium-40
C. the half-life of potassium-40
D. the identity of an index fossil

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