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how much of a radioactive kind of protactinium will be left after 28 hours if you start with 672 grams and the half-life is 7 hours?
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how much of a radioactive kind of protactinium will be left after 28 hours if you start with 672 grams and the half-life is 7 hours?

User KangarooChris
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1 Answer

12 votes

Answer:

Explanation:

672·0.5^(28/7) = 672·0.5⁴ = 42 grams

User Jesse Lee
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