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

  • question_answer For the energy levels in an atom, which one of the following statements is correct           [AIIMS 1983]

    A)                 There are seven principal electron energy levels

    B)                 The second principal energy level can have four sub-energy levels and contains a maximum of eight electrons

    C)                 The \[M\]energy level can have maximum of 32 electrons

    D)                 The \[4s\] sub-energy level is at a higher energy than the \[3d\] sub-energy level

    Correct Answer: B

    Solution :

                    The second principal shell contains four orbitals viz  \[2s,\,2{{p}_{x}},\,\,2{{p}_{y}}\] and \[2{{p}_{z}}.\]

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