Question: How long will it take a given quantity of plutonium-239 to lose 80% of its radioactivity? (Round your answer to the nearest whole number. The

How long will it take a given quantity of plutonium-239 to lose 80% of its radioactivity? (Round your answer to the nearest whole number. The half-life of plutonium-239 is 86 years.)

The half-life of plutonium-239 is 86 years.

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