Physics

Physics

Problem

A radioactive sample initially consists only of nuclide PP. After 12.0 h12.0\,\text{h} the numbers of PP atoms and its stable daughter DD atoms are equal. What is the decay constant λP\lambda_P of PP? a) 5.8×10−2 h−15.8\times10^{-2}\,\text{h}^{-1} b) 1.2×10−1 h−11.2\times10^{-1}\,\text{h}^{-1} c) 4.2×10−2 h−14.2\times10^{-2}\,\text{h}^{-1} d) 2.5×10−2 h−12.5\times10^{-2}\,\text{h}^{-1}

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