The half-life period of a radio-active element `X` is same as the mean life time of another radio-active element `Y`. Initially they have the same number of atoms. Then:A. `X` will decay faster than `Y`B. `Y` will decay faster then `X`C. `X` and `Y` have same decay rate initiallyD. `X` and `Y` decay at same rate always

The half-life period of a radio-active element `X` is same as the mean

1.	The half-life period of a radio-active element `X` is same as the mean life time of another radio-active element `Y`. Initially they have the same number of atoms. Then:A. `X` will decay faster than `Y`B. `Y` will decay faster then `X`C. `X` and `Y` have same decay rate initiallyD. `X` and `Y` decay at same rate always
Answer» Correct Answer - B `( l n2)/(lambda_(x))=(1)/(lambda_(gamma))=lambda_(gamma)=1.4lambda_(x), lambda_(gamma)gtlambda_(X), Y` will decay fater than `X`

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