91. If the half – life of a sample of radioactive material is 60 days, what...
91. If the half – life of a sample of radioactive material is 60 days, what fraction of the original radioactive nuclei will remain after 120 days.
Homework Answers
Since half life of radioactive sample is 60 days.
Therefore, 120 days represents 2 half lives,
After 2 half lives, fraction remaining is (1 / 2)2 = 1/4 Answer
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