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DUMET Medical DUMET Medical Solved Paper-2009

  • question_answer
    A metallic ion \[{{M}^{2+}}\]has an electronic configuration of 2, 8, 14 and the ionic weight is 56 u. The number of neutrons in its nucleus are

    A)  30              

    B)  32

    C)  34              

    D)  42

    Correct Answer: A

    Solution :

    \[\because \] Number of electrons present in \[{{M}^{2+}}\] ion = 2 + 8 + 14 = 24 \[\therefore \] Number of electrons present in M atom = 24 + 2 = 26 ie, atomic number of M = 26 and, atomic weight = ionic weight =56 \[\therefore \] Number of neutrons = 56 - 26 = 30


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