Quantum Numbers

Another way to name elements on the table is with quantum numbers. There are a total of 4. First there is t he Principal Quantum Number (signified by the letter 'n'). This can be found just by identifying which energy level the element is in.

The Azimuthal Quantum Number (signified by the letter 'ℓ') is based on the sublevel:

s= 0

p-1

d=2

f=3

The Magnetic Quantum Number (signified by the letter 'm' or mℓ) is also based on the sublevel. Depending on the number of orbitals, this will either be 0, -/+1, -/+ 2, or -/+3.

The Spin Quantum Number (signified by the letter 's' or ms) is based on the magnetic quantum number, but it is whichever number you run out of electrons on, when you're making the electron configurations. 1 electron is a +1/2 spin, 2 electrons is a -1/2 spin.