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

  • question_answer Consider the ground state of \[(Z=24)\]. The numbers of electrons with the azimuthal quantum numbers, \[l=1\] and 2 are, respectively                                       [AIEEE 2004]

    A)                 16 and 4              

    B)                 12 and 5

    C)                 12 and 4              

    D)                 16 and 5

    Correct Answer: B

    Solution :

               \[_{24}Cr\to 1{{s}^{2}},\,2{{s}^{2}},\,\underset{l=1}{\mathop{2{{p}^{6}}}}\,,\,3{{s}^{2}},\,\underset{l=1}{\mathop{3{{p}^{6}}}}\,,\underset{l=2}{\mathop{\,3{{d}^{5}}}}\,,\,4{{s}^{1}}\]                    (We know that for p the value of \[l=1\] and for \[d,\] \[l=2)\]                    For \[l=1\] total number of electron = 12                                 For \[l=2\] total number of electron = 5.

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