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General Chemistry15. Chemical KineticsHalf-Life

Multiple Choice

Radioactive plutonium-239 (t_1/2 = 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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