Which of the following sets of quantum number is correct for an electron in 4f orbital?

Which of the following sets of quantum number is correct for an electron in 4f orbital?

A
$n = 4, l = 3, m = + 4, s = + 1 / 2$
B
$n = 4, l = 4, m = - 4, s = - 1 / 2$
C
$n = 4, l = 3, m = + 1, s = + 1 / 2$
D
$n = 3, l = 2, m = - 2, s = + 1 / 2$

Solution:

For a 4f orbital, we have

Principal quantum number, $n = 4$ ; Azimuthal quantum number, $l = 3$

Magnetic quantum number, m =anyone value from $+ 3, + 2, + 1, 0, - 1, - 2, - 3$

For an electron in this orbital, spin quantum number, $s = either + 1 / 2 or - 1 / 2$

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