JEE Main & Advanced Chemistry Structure of Atom Question Bank Quantum number, Electronic configuration and Shape of orbitals

  • question_answer Ions which have the same electronic configuration are those of

    A)                 Lithium and sodium       

    B)                 Sodium and potassium

    C)                 Potassium and calcium 

    D)                 Oxygen and chlorine

    Correct Answer: C

    Solution :

                    \[{{K}^{+}}\] and \[C{{a}^{++}}\] have the same electronic configuration \[(1{{s}^{2}},\,2{{s}^{2}}\,2{{p}^{6}},\,3{{s}^{2}}3{{p}^{6}})\]

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