Chemistry (AS Level)·Atomic structure · NSSCAS 1.2.3
Ionisation energy
Narrated lesson · press play
Ionisation energy is the real, measurable evidence that electrons live in shells and sub-shells. Learn to define it precisely, understand the three factors that control it, and read successive ionisation energies to deduce an element's electronic structure — and its group.
What you'll learn in this lesson
By the end you should be able to (NSSCAS Chemistry (AS Level) 1.2.3):
- Explain and use the term ionisation energy (with equations and state symbols)
- Explain the factors that influence ionisation energies (nuclear charge, distance/atomic radius, shielding)
- Use successive ionisation energies as evidence for electron shells and sub-shells, and to deduce the group of an element
Loading your lesson…
You're watching a free 3-minute preview — create a free account to keep going.
Quick revision
Revise this in 5 minutes
Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.