A sample of radioactive material A, that has an activity of 
decays, has twice the number of nuclei as another sample of a different radioactive material 
which has an acitvity of 
. The correct choices for half-lives of 
and 
would then be respectively:
A
days and 
days B
days and 
days
C
days and 
days 
days and 
days
Text Solution
Verified by ExpertsThe correct answer is:
C
For material, 
For material, 
i.e. 
days half-lives for 
and 
days 
For material 
:
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