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Electronic Configuration of d- Block

If the half l...

Question

If the half life of a radioactive sample is 10 hours, its mean life is

A

14.4 hours

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B

7.2 hours

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C

20 hours

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D

6.93 hours

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Solution

The correct option is A 14.4 hours
Mean life $= \frac{H a l f l i f e}{0.6931} = \frac{10}{0.6931} = 14.4 h o u r s$

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