?43ERates of Radioactive Decay (Section)Potassium-40
Chapter , Problem 43E(choose chapter or problem)
43E
Rates of Radioactive Decay (Section)
Potassium-40 decays to argon-40 with a half-life of 1.27 * 109 yr. What is the age of a rock in which the mass ratio of 40Ar to 40K is 4.2?
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