For an electron in a given shell having principal quantum number n, the possible values of azimuthal quantum number is from 0 to n - 1.
Thus, the underlying condition is n > l.
The possible subshells with n + l = 7 are given below:
| Principal quantum number |
Azimuthal quantum number |
Subshell |
| 7 |
0 |
7s |
| 6 |
1 |
6p |
| 5 |
2 |
5d |
| 4 |
3 |
4f |
