Americium-243 has a decay constant of 9.39 × 10-5 years-1. How long will it take for a sample of americium to lose one-third of its nuclei?

A) 2960 s
B) 10.6 × 103 years
C) 4.32 × 103 years
D) 6.44 × 103 years
E) 7.84 × 103 years


C

Physics & Space Science

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