JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties Question Bank Valency and oxidation state

  • question_answer Which of the following electronic configurations in the outermost shell is characteristic of alkali metals [Bihar CEE 1992]

    A) \[(n-1)\,{{s}^{2}}{{p}^{6}},\,n{{s}^{2}}{{p}^{1}}\]

    B) \[(n-1)\,{{s}^{2}}{{p}^{6}}{{d}^{10}},\,n{{s}^{1}}\]

    C) \[(n-1)\,{{s}^{2}}{{p}^{6}},\,n{{s}^{1}}\]

    D) \[n{{s}^{2}}{{p}^{6}}{{d}^{1}}\]

    Correct Answer: C

    Solution :

    Alkali metals have the configuration \[(n-1){{s}^{2}}{{p}^{6}},n{{s}^{1}}\]


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