If a radiometric analysis of an isotope and its stable element yielded 25% of the isotope and 75% of its stable element,how many half-lives would have occurred?

Name: If a radiometric analysis of an isotope and its stable element yielded 25% of the isotope and 75% of its stable element,how many half-lives would have occurred?
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Question

Quizplus · Accepted Answer

After one half-life, 50% of the original isotope remains. After two half-lives, this amount halves again to 25%, indicating that two half-lives have occurred.

If a Radiometric Analysis of an Isotope and Its Stable