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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic number, Mass number Atomic species

  • question_answer
    Which one of the following groupings represents a collection of isoelectronic species     [AIEEE 2003]

    A)                 \[N{{a}^{+}},\,C{{a}^{2+}},M{{g}^{2+}}\]              

    B)                 \[{{N}^{3-}},\,{{F}^{-}},\,N{{a}^{+}}\]

    C)                 \[Be,\,A{{l}^{3+}},\,C{{l}^{-}}\] 

    D)                 \[C{{a}^{2+}},\,C{{s}^{+}},\,Br\]

    Correct Answer: B

    Solution :

     \[{{N}^{3-}},{{F}^{-}}\] and \[N{{a}^{+}}\] (These three ions have \[{{e}^{-}}=10\], hence they are isoelectronic)


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