Which of the following is a possible set of quantum numbers for an electron?

(1, 0, 0, +1)
(2, 2, 1, +½)
(4, -3, 0, -½)
(3, 2, 1, -½)

Question

Which of the following is a possible set of quantum numbers for an electron?

(1, 0, 0, +1)
(2, 2, 1, +½)
(4, -3, 0, -½)
(3, 2, 1, -½)

imqwerty · Answer

the $l$ quantum number varies from $0$ to $(n-1)$  the 2nd and 3rd options don't follow this rule and get eliminated
the $s$ quantum number can be either $\large +\frac{1}{2}$  or $\large -\frac{1}{2}$  this eliminates option 1
so we are left with option 4 which is the correct answer