The half-life period of a radioactive element X is same as the mean-life time of another radioactive element Y. Initially both of them have the same number of atoms. Then
Text Solution
Verified by ExpertsThe correct answer is:
C
Let 
and 
be the decay constants of the radioactive elements 
and 
respectively.
Here, half - life period of element 
mean life time of element Y
or 
or 
Therefore, the element Y will decay faster.
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