For a shell with principal quantum number n, the orbital quantum number, l, has all of the integer values from 0 to n-1. Each value of l represents a subshell.

For each value of l, the magnetic quantum number, ml has all of the integer values from -l to +l. Each value of ml represents an orbital.

The orbital is labelled with the value of n and a code for the value of l from the table below. If there is more than one value of ml then a subscript is added which describes the orientation of the orbital.

Orbital quantum number, l:01234...
Orbital label:spdfg...




Click on the buttons to work through each shell and its orbitals. Examine how these rules for n, l and mi work and the shapes and properties of the orbitals.