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One gram of radium is reduced by 2 mili...

One gram of radium is reduced by `2` miligram in `5` yers by `alpha`-decay. Calculate the half-life of radium.

Text Solution

Verified by Experts

Mass of radium left after 5 years = (1.0 - 0.0021) g
= 0.9979 g
Apply `lambda = (2.303)/(t) log_(10) (N_(0))/(N) = (2.303)/(5) log_(10) (1)/(0.9979)`
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