JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Artificial Transmutation

  • question_answer
    The half-life period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to [CPMT 1989; IIT 1986; EAMCET 1992; MP PET 1997; UPSEAT 1999]

    A)                 \[1/2\,g\]           

    B)                 \[1/4\,g\]

    C)                 \[1/8\,g\]           

    D)                 \[1/16\,g\]

    Correct Answer: D

    Solution :

              \[N=\frac{{{N}_{o}}}{{{2}^{n}}}\] and \[n=\frac{560}{140}=4;\] \[N=\frac{1}{{{2}^{4}}}=\frac{1}{16}gm.\]


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