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The half life of radium is 1600 years. The mean life of radium is

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800 years

2304 years

3209 years

2903 years

answer is B.

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Detailed Solution

$T_{\frac{1}{2}} = 1600 y e a r s$

Mean life $τ = 1.44 \times T_{\frac{1}{2}}$

$= 1.44 \times 1600 = 2304 y e a r s$

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