In a radioactive disintegration, the ratio of initial number of atoms to the number of atoms present at an instant of time equal to its mean life is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
let the initial number of atoms at time 
be 
.
Let the number of atoms at any instant of time 
be 
.
According to radioactive decay law, 
Mean life, 
,
where 
is the decay constant. Here, 
(given)
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