The half-life of ³H is 12 years. About how long does it take for 7/8 of a sample of that radionuclide to decay?

Name: The half-life of 3 H is 12 years. About how long does it take for 7/8 of a sample of that radionuclide to decay?
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Question

Quizplus · Accepted Answer

To find the time it takes for 7/8 of a sample to decay, we can use the half-life formula. Since 7/8 of the sample has decayed, 1/8 remains. This means the sample has gone through three half-lives (1/2 -> 1/4 -> 1/8). Three half-lives of 12 years each total 36 years.

The Half-Life of 3H Is 12 Years

The Half-Life of ³H Is 12 Years