For the 4s orbital,
4 stands for the principal quantum number n; s stands for the subshell s having the value of azimuthal quantum number, l = 0.
In the ‘s’ subshell, there is only one orbital and has magnetic quantum number, ml = 0.
The two electrons in this orbital have opposite spins.
Thus,
The four quantum numbers of two electrons in 4s orbital are :
|
n |
l |
ml |
ms |
| Electron 1 |
4 |
0 |
0 |
+1/2 |
| Electron 2 |
4 |
0 |
0 |
-1/2 |
