The half life period of radioactive element ${x}$ is same as the mean life time of another radioactive element $y.$ Initially they have the same number of atoms. Then:

  • [JEE MAIN 2021]
  • A

    ${x}$-will decay faster than ${y}$.

  • B

    ${y}$ - will decay faster than ${x}$.

  • C

    ${x}$ and ${y}$ have same decay rate initially and later on different decay rate.

  • D

    ${x}$ and ${y}$ decay at the same rate always.

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  • [AIEEE 2006]

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