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

question 26

Multiple Choice

The material used in nuclear bombs is ²³⁹Pu,with a half-life of about 20,000 years.How long must we wait for a buried stockpile of this substance to decay to 4% of its original ²³⁹Pu mass?

• A)93 thousand years
• B)64 thousand years
• C)45 thousand years
• D)0.80000001 thousand years

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Definitions:

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The neuron that receives a signal (neurotransmitters) from another neuron at a synapse, following the presynaptic neuron.