The activity of a sample of a radioisotope at some time is 10.7 mCi and 0.36 h later it is 7.80 mCi. Determine the following. (a) Decay constant (in s-1) 2.4e-4 s-1 (b) Half-life (in h) 2887.916 How is the half-life related to the decay constant? h (c) Nuclei in the sample when the activity was 10.7 mCi 2887.916 How is the number of nuclei related to the decay constant and the activity? nuclei
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