JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Causes of radioactivity and Group displacement law

  • question_answer
    The end product of \[(4n+1)\] radioactive disintegration series is              [MP PMT 1999]

    A)                 \[_{83}B{{i}^{209}}\]      

    B)                 \[_{84}P{{o}^{210}}\]

    C)                 \[_{82}P{{b}^{208}}\]    

    D)                 \[_{82}P{{b}^{207}}\]

    Correct Answer: A

    Solution :

              The mass no. division by four gives a residue of 1


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