NEET Sample Paper NEET Sample Test Paper-32

  • question_answer Beryllium fourth electron will have the four quantum numbers :-

    A)

    n - 1 \[\ell \]- 0 m - 0 s - \[1/2\]

    B)

    n - 1 \[\ell \]- 1 m - 1 s - \[1/2\]

    C)

    n - 2 \[\ell \]- 0 m - 0 s - \[-1/2\]

    D)

    n - 2 \[\ell \]- 1 m - 0 s - \[+1/2\]

    Correct Answer: C

    Solution :

    \[_{4}Be\Rightarrow 1{{s}^{2}}2{{s}^{2}}\] \[\Rightarrow \] \[n=2,\,\ell =0,\,m=0,\,s=+\frac{1}{2}\]  or \[-\frac{1}{2}\]

adversite



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