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JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Extended or long form of periodic table

  • question_answer
    \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}\] is the electronic configuration of the metal [RPET 2000]

    A) \[Na\]

    B) \[Mg\]

    C) \[Fe\]

    D) \[Al\]

    Correct Answer: B

    Solution :

      On equating no. of \[{{e}^{-}}\]?s atomic no. is 12 which is for \[Mg\].


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