Question

After three half-lives, what fraction of the original radioactive isotope remains ?
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Answer 1

What part of an original isotope's number of atoms remain after two half-lives? Explain and provide evidence for your claim. After three half-lives of an isotope, 1 billion (⅛) of the original isotope's atoms still remain in a certain amount of this element.

Answer 2

Answer:

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Explanation:

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