We do this with something called electron configurations. They are adequately a guide of the electrons for a given molecule. We look at the four quantum numbers for a given electron and then assign that electron to a specific orbital.
For any value of n, a value of l=0 places that electron in an s orbital. This orbital is spherical in shape
we can have three possible orbitals when l=1. These are designated as p orbitals and have dumbbell shapes. Each of the p orbitals has a different orientation in three-dimensional space
When l=2, ml values can be -2, -1, 0, +1, +2 for a total of five d orbitals. Note that every one of the five of the orbitals have particular three-dimensional introductions.
The most complex arrangement of orbitals are the f orbitals. When l=3, ml values can be -3, -2, -1, 0, +1, +2, +3 for a total of seven different orbital shapes. Again, note the specific orientations of the different f orbitals.
There are four different classes of electron orbitals.
These orbitals are determined by the value of angular momentum quantum number l.