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JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Isotopes-Isotones and Nuclear isomers

  • question_answer
    If a radioactive isotope with atomic number A and mass number M emits an \[\alpha \]-particle, the atomic number and mass number of that new isotope will become [NCERT 1980]

    A)                 A ? 2,  M ? 4      

    B)                 A ? 2,  M

    C)                 A,  M ? 2             

    D)                 A ? 4,  M ? 2

    Correct Answer: A

    Solution :

              \[_{A}{{X}^{M}}\xrightarrow{-\alpha }{{\,}_{A-2}}{{Y}^{M-4}}\]


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