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Home Q & A Board Science-Related Homework Help Physics
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drake34 drake34
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6 years ago
If the half-life of some radioactive element is 1 billion years, and a mass of rock originally contained 100 g of that element, how many grams of the radioactive element would be left after three billion years had passed?
A) 6.25 g
B) 12.5 g
C) 25 g
D) 50 g
E) none
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EnderWolfeEnderWolfe
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6 years ago
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drake34 Author
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#2
6 years ago
You're an excellent tutor!
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