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If the half life of Pu-239 is 2.4 x 10^4 years, how many years are required for a 20-gram sample of plutonium-239 to be reduced to a mass of 5 grams?
Answers
Answered by
Scott
5 / 20 = 1/4 = (1/2)^2
2 half-lives
2 half-lives
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