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

  • question_answer
    A nuclide of an alkaline earth metal undergoes radioactive decay by emission of the \[\alpha -\]particles in succession. The group of the periodic table to which the resulting daughter element would belong is      [CBSE PMT 2005]

    A)                 Gr.14    

    B)                 Gr.16

    C)                 Gr.4      

    D)                 Gr.6

    Correct Answer: B

    Solution :

              \[\underset{\text{Gr}\text{.2}}{\mathop{_{Z}{{A}^{M}}}}\,\xrightarrow{-\alpha }\underset{\text{Gr}\text{. 18}}{\mathop{_{Z-2}{{B}^{M-4}}}}\,\xrightarrow{-\alpha }\underset{\text{Gr}\text{.16}}{\mathop{_{Z-4}{{C}^{M-8}}}}\,\].


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