Manipal Medical Manipal Medical Solved Paper-2003

  • question_answer
    Which pair is isoelectronic?

    A)  \[Ar\] and \[Cl\]

    B) \[N{{a}^{+}}\]and\[Ne\]

    C) \[N{{a}^{+}}\]and \[Mg\]

    D) \[Mg\]and \[Ne\]

    Correct Answer: B

    Solution :

     \[Na(11)=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{1}}\] \[N{{a}^{+}}(10)=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] \[N{{e}^{+}}(10)=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] \[\therefore \] \[N{{a}^{+}},Ne\]are isoelectronic.


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