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10-10-2020
Geography

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How many half-lives have passed when there are three times as much daughter isotope as parent isotope?

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12-10-2020

Answer:

3 half live have passed.

Explanation:

After 1 half-life , 500 g of the parent isotope will remain. After 2 half-lives , 250 g of the parent isotope will remain. After 3 half-lives , 125 g of the parent isotope will remain.

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