Which of the following is not permissible arrangement of electrons in an atom ?

Options

A. `n = 5, l = 3, m = 0, s =+1//2`
B. `n = 3, l = 2, m =- 3, =+1//2`
C. `n = 3, l = 2, m =- 2, s =- 1//2`
D. `n = 4, l = 0, m = 0, s=- 1//2`

Answer

B

Explanation

For an orbital electron whose azimuthal quantum number is `l`, the magnetic quantum number `m_(l)` can have any intergral value form `-l` to `+l`, including zero. Thus, the value of `m_(l)` can never be greater than that of `l`. In the second set. `l = 2`, so `m_(l)` cannot be `-3`.