What percent of a present amount of radioactive plutonium (239Pu) will remain after 15,000 years? (The half-life of 239Pu is 24,100 years.)
To calculate: The remaining percent of the present amount of radioactive plutonium
Given Information:
The half-life of
Formula used:
Exponential growth and decay:
If the rate of change of a positive quantity
If
Calculation:
Consider the equation
Here, the half-life of
Substitute
Take natural log on both the sides,
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