Principal quantum number (n) permitted numbers: whole numbers starting with 1.

Azimuthal quantum number or angular quantum number (l): n numers - zero to (n-1)

Magnetic quantum number ( m

_{l}): (2l+1) numbers -l to 0 to +l

Spin quantum number (m

_{s}): +1/2 and -1/2 or ↑ ↓.