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Americium-241 is used in smoke detectors. Its half-life is 432.2 years. Calculate the lifetime and the decay rate constant. What fraction of Am-241 will decay

Americium-241 is used in smoke detectors. Its half-life is 432.2 years. Calculate the lifetime and the decay rate constant. What fraction of Am-241 will decay in 171 years? Answer: T(year)= k(year1)= Fraction(%)=

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