AQA A-Level Chemistry - Ionisation Energies

This video runs through the Ionisation Energies topic, covering what the term means, how to write the equations and also basic trends.
It does not cover the trend in Ionisation Energies across Period 3 (mainly the dip in IE between Mg and Al (due to electrons being different distances from the nucleus) and P and S (due to electron pair repulsion)), that is covered in the Periodicity video.