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How many atoms of isotope were contained in the freshly prepared sample? Answer in units of...

How many atoms of isotope were contained in the freshly prepared sample? Answer in units of nuclei. What is the sample’s activity 26 h after it is prepared? Answer in units of mCi. (info to answer this below)

A freshly prepared sample of a certain radioactive isotope has an activity of 9.2 mCi. After 3.46 h, the activity is 7.5 mCi. Find the decay constant. Answer in units of h?1 . (The answer to this is .059) 003 (part 2 of 4) 10.0 points Find the half-life of the isotope. Answer in units of h. (answer is 11.75)

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