Question
Iodine-131 has a half-life of 8 days. How many days would it take for a sample of Iodine -131 to go from 50 grams to 3.125 grams?
Answers
Note that 3.125/50 = 1/16 = (1/2)^4
That means that 4 half-lives have passed: 32 days
That means that 4 half-lives have passed: 32 days
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