Solution: A freshly prepared sample of a certain radioactive
Chapter 44, Problem 26(choose chapter or problem)
A freshly prepared sample of a certain radioactive isotope has an activity of 10.0 mCi. After 4.00 h, its activity is 8.00 mCi. Find (a) the decay constant and (b) the half-life. (c) How many atoms of the isotope were contained in the freshly prepared sample? (d) What is the samples activity 30.0 h after it is prepared?
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