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The half life period of a radioactive el...

The half life period of a radioactive element X is same as the mean life time of another radioactive element Y.Initially, they have the same number of atoms. Then

A

`P` and `Q` decay at the same rate always

B

`P` will decay at a faster rate than `Q`

C

`Q` will decay at a faster rate than `P`

D

`P` and `Q` have the same decay rate initially

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The correct Answer is:
B
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