Questions
The half-life of a radioactive substance is 40 years. How long will it take to reduce to one fourth of its original amount and what is the value of decay constant?
detailed solution
Correct option is D
To reduce one fourth it takes time t=2(T1/2)=2 x 40=80 years.Decay constant λ=0.693T1/2=0.0173 yearsTalk 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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