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quickstudent:
Radon-222 is a radioactive gas with a half-life of 3.82 days. How long would it take for fifteen-sixteenths of a sample of radon-222 to decay? 15.28 days 30.56 days 45.84 days 49.66 days
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quickstudent:
15.28 days?
quickstudent:
Yes, it's 15.28 days.
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