The half life period of radioactive element 
is same as the mean life time of another radioactive element y. Initially they have the same number of atoms. Then:
A
-will decay faster than 
.
B
- will decay faster than 
.
C
and 
have same decay rate initially and later on different decay rate.
D
and 
decay at the same rate always.
Text Solution
Verified by ExpertsThe correct answer is:
B
Also, initially 
Activity 
As 
will decay faster than x
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