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

  • question_answer
    The configuration \[1{{s}^{2}},\,2{{s}^{2}}2{{p}^{5}},\,3{{s}^{1}}\] shows               [Pb. PMT 2002]

    A)                 Excited state of \[O_{2}^{-}\]    

    B)                 Excited state of neon

    C)                 Excited state of fluorine

    D)                 Ground state of fluorine atom

    Correct Answer: B

    Solution :

                    The ground state of neon is \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\]on excitation an electron from \[2p\] jumps to \[3s\] orbital. The excited neon configuration is \[1{{s}^{2}}2{{s}^{2}}2{{p}^{5}}3{{s}^{1}}\]. 

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