Americium-241 is used in smoke detectors it has a first, Chemistry

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Americium-241 is used in smoke detectors it has a first

Americium-241 is used in smoke detectors. It has a first order rate constant for radioactive decay of k=1.6 x 10^-3 yr^-1. By contrast, iodine-125, which is used to test for thyroid functioning, has a rate constant for radioactive decayof k=.oo1 day^-1.

(a) what are the half lives of these two isotopes?

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