Questions
If half-life of a substance is 3.8 days and its quantity is 10.38 gm. Then substance quantity remaining left after 19 days will be
detailed solution
Correct option is B
Number of half-lives n=193.8=5; Now NN0=12n⇒N10.38=(12)5⇒N=10.38 x (12)5=0.32 gmTalk to our academic expert!
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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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