4-3 Electron Configuration

Sub shells (boxes) must have at least 1 e- in each orbital before placing another e- and filling

Rule that electrons occupy the orbitals of lowest energy first

No two electrons in the same atom can have the same set of four quantum numbers

No two electrons can have identical quantum numbers

Electrons can occupy the same orbital with identical spins

Maximum three electrons per orbital

Electrons in different orbitals must have the same spin

All electrons should be paired first

Electrons should occupy orbitals singly before pairing

Electrons can be in any spin orientation

Electrons should fill the lowest energy orbitals first

Both arrows in the 2p box should be pointing up

There is nothing incorrect with this diagram

There should be 1 electron (arrow) in the first 2p box and one in the 2nd 2p box

All the arrows should be pointing up.