3. The half-life of 99m Tc is six hours. a) What is the decay constant in sec^ -1 b) If there are 1.15 * 10 ^ 12 atoms o

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3. The half-life of 99m Tc is six hours. a) What is the decay constant in sec^ -1 b) If there are 1.15 * 10 ^ 12 atoms o

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3. The half-life of 99m Tc is six hours. a) What is the decay constant in sec^ -1 b) If there are 1.15 * 10 ^ 12 atoms of 99mTc present initially, what is the activity of the sample in MBq and in mCi ? c) What was the activity 16 hours before this initial time point ?
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