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QUESTION
A certain radioactive element has a half-life of one hour. If you start with 40.0 grams of the element at noon, how much of the radioactive element
A certain radioactive element has a half-life of one hour. If you start with 40.0 grams of the element at noon, how much of the radioactive element will be left at 2 p.m.? (3 points)
20.0 grams
10.0 grams
5.0 grams
0.0 grams
