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

  • question_answer Which electronic configuration for oxygen is correct according to Hund's rule of multiplicity

    A)                 \[1{{s}^{2}},2{{s}^{2}}2p_{x}^{2}2p_{y}^{1}2p_{z}^{1}\]               

    B)                 \[1{{s}^{2}},2{{s}^{2}}2p_{x}^{2}2p_{y}^{2}2p_{z}^{0}\]

    C)                 \[1{{s}^{2}},2{{s}^{2}}2p_{x}^{3}2p_{y}^{1}2p_{z}^{0}\]               

    D)                 None of these

    Correct Answer: A

    Solution :

                    Hund?s rule states that pairing of electrons in the orbitals of a subshell (orbitals of equal energy) starts when each of them is singly filled.

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