Respuesta :
Only these values can exist... N=? L=0 to N-1 M=+ to - L S=+ or - 1/2
The m ℓ quantum number must be between −ℓ and ℓ, which it is. The spin quantum number is +1/2, which is allowed. Because this set of quantum numbers follows all restrictions, it is possible. ... The principal quantum number n is an integer, but ℓ is not allowed to be negative.