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

  • question_answer Which one of the following configuration represents a noble gas                              [CPMT 1983, 89, 93; NCERT 1973; MP PMT 1989; DPMT 1984]

    A)                 \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}\]       

    B)                 \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}}\]

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

    D)                 \[1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}\]

    Correct Answer: C

    Solution :

     \[1{{s}^{2}},\,2{{s}^{2}},\,2{{p}^{6}}\] represents a noble gas electronic configuration.

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