The half-life of the radioactive element plutonium-239 is 25,000 years. If 16 grams of plutonium-239 are initially
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The half-life of the radioactive element plutonium-239 is 25,000 years. If 16 grams of plutonium-239 are initially present, how many grams are present after 25,000 years? 50,000 years? 75,000 years? 100,000 years? 125,000 years?
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