Question: A sample of a radioactive isotope is found to have an activity 115.0 Bq immediately after it is pulled from a reactor that fonned

A sample of a radioactive isotope is found to have an activity 115.0 Bq immediately after it is pulled from a reactor that fonned it. Its activity 3 hours later is measured to be 85.2 (a) (b) Calculate the decay constant and half life of the sample. How many radioactive nuclei were there in the sample initially?

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