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

  • question_answer The atom of the element having atomic number 14 should have                                               [AMU 1984]

    A)                 One unpaired electron 

    B)                 Two unpaired electrons

    C)                 Three unpaired electrons            

    D)                 Four unpaired electrons

    Correct Answer: B

    Solution :

               Atomic number 14 leaving 2 unpaired electron            \[_{14}Si=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{2}}\]

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