If half life period of radium is $1600$ years, its average life period will be:

2304

years

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4608

years

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230.4

years

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23040

years

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Solution

The correct option is A $2304$ years
Half life = $1600 = \frac{l n 2}{λ} = l n 2 \times A v e r a g e l i f e$
$= A v e r a g e l i f e = \frac{1600}{l n 2} = 2308.8 y e a r s$

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