Two nuclei 
and 
have equal numbers of atoms at 
. Their half lives are 3 hours and 9 hours respectively. Compare their rates of disintegration after 18 hours from the start:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Number of half -lives of of 
in 18 hours 
Number of half -lives of 
in 18 hours 
Number of nuclei left undecayed
The ratio of their rates of disintegration is
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