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7. A sample of a radioactive isotope is found to have an activity of 115 Bq immediately after it is pulled from the reactor that formed it. Its activity 2 hours and 15 minutes later is measured to be 85.2 Bq. (a) Calculate the decay constant and the half-life of the sample. (b) How many radioactive nuclei were there in the sample initially?© BrainMass Inc. brainmass.com March 5, 2021, 12:29 am ad1c9bdddf
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The expert examines radioactive nuclei.