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JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Radioactivity

  • question_answer
    If the radioactive decay constant of radium is \[1.07\times {{10}^{-4}}\]per year, then its half life period is approximately equal to [AIIMS 1998]

    A)            8,900 years                           

    B)            7,000 years

    C)            6,476 years                           

    D)            2,520 years

    Correct Answer: C

    Solution :

               Half-life \[{{T}_{1/2}}=\frac{0.693}{\lambda }=\frac{0.693}{1.07\times {{10}^{-4}}}=6476\ years\]


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