One Material Used in Nuclear Bombs Is ²³⁹Pu,with a Half-Life

question 9

Multiple Choice

One material used in nuclear bombs is ²³⁹Pu,with a half-life of 24,000 years.How long must we wait for a buried stockpile of this substance to decay to 1/1000 of its original activity?

• A)1,200,000 years
• B)240,000 years
• C)150,000 years
• D)82,000 years
• E)1,500 years

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