15. Chemical Kinetics
Half-Life
Multiple Choice
Multiple ChoiceRadioactive plutonium-239 (t1/2 = 2.41 × 105 yr) is used in nuclear reactors and atomic bombs. If there are 5.70 × 102 g of plutonium isotope in a small atomic bomb, how long will it take for the substance to decay to 3.00 × 102 g?
A
2.23×105 yr
B
2.60×105 yr
C
517 yr
D
600 yr
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