Phosphorous - 32 has a half-life of 14.3 days. How many days are required for 4.00 grams of phosphorous - 32 to decay to 1.00 gram?

Name: Phosphorous - 32 has a half-life of 14.3 days. How many days are required for 4.00 grams of phosphorous - 32 to decay to 1.00 gram?
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Question

Quizplus · Accepted Answer

The decay of a substance to a quarter of its original amount requires two half-lives. Since the half-life of phosphorous-32 is 14.3 days, two half-lives would be 28.6 days.

Phosphorous - 32 Has a Half-Life of 14