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

  • question_answer
    Which of the following set of quantum numbers is correct for the 19th electron of chromium       [DCE 2001]

    A)                 n-3         l-0           m-0        s- 1/2

    B)                 n-3         l-2           m- ? 2   s- 1/2

    C)                 n-4         l-0           m- 0       s- ½

    D)                 n-4         l-1           m- ?1    s- ½

    Correct Answer: C

    Solution :

                    19th electron of chromium is \[4{{s}^{1}}\] \[n=4,\ l=0,\ m=0,\ s=+\frac{1}{2}\]

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