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Americium-243 Has a Decay Constant of 9 10−510^{ - 5}  years −1\text { years } - 1

Question 69

Multiple Choice

Americium-243 has a decay constant of 9.39 × 10−510^{ - 5}  years −1\text { years } - 1 How long will it take for a sample of americium-243 to lose one-third of its nuclei?


A) 2960 s
B) 10.6 × 10310 ^ { 3 } y
C) 4.32 × 10310 ^ { 3 } y
D) 6.44 × 10310 ^ { 3 } y
E) 7.84 × 10310 ^ { 3 } y

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