Questions
A radioactive material has half-life of 10 days. What fraction of the material would remain after 30 days?
a
0.125
b
0.25
c
0.5
d
0.33
detailed solution
Correct option is A
If N be the number of atoms of a radioactive substance left at some instant of time, thanN=N012nwhere N0 is the initial number of atoms and n is number of half lives.∴n=tT/2=3010=3∴NN0=123=123=18=0.125Talk to our academic expert!
Similar Questions
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
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