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The half-life period of a radio-active e...

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 and Y decay at same rate always

B

X will decay faster than Y

C

Y will decay faster than X

D

X and Y have same decay rate initially

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The correct Answer is:
B
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