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AQA A Level Chemistry

Ionisation
Energy

Ionisation energy in AQA 3.1.1 links atomic structure to electron configuration. These pages cover the definition of first ionisation energy, equations for first and successive ionisation energies, and how ionisation energy evidence supports the arrangement of electrons in shells and sub-shells.

Exam Paper
Paper 1
7405/1
Specification Point
3.1.1.3
Electron configuration
Topic Parts
2 parts
Revision notes available
Exam Board
AQA
AQA 7405

Revision Notes

Work through Ionisation Energy in a structured AQA sequence.

First electron removed
Intro to
Ionisation
1
Available

Introduction to Ionisation Energy

Definition of first ionisation energy, gas-state equations, nuclear attraction, shielding, atomic radius and key trend explanations.

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Evidence for shells
Successive
Ionisation
2
Available

Successive Ionisation Energies

Successive ionisation equations, large jumps, electron shell evidence and using Period 3 and Group 2 data to support electron configurations.

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Specification Coverage

3.1.1.3 Electron configuration – AQA A Level Chemistry

The following AQA specification points are the ionisation-energy content within 3.1.1.3 Electron configuration.

3.1.1.3 Electron configuration

3.1.1.3
Electron configurations of atoms and ions up to Z = 36 in terms of shells and sub-shells (orbitals) s, p and d.
3.1.1.3
Ionisation energies.
Skills
Students should be able to:
1
define first ionisation energy
2
write equations for first and successive ionisation energies
3
explain how first and successive ionisation energies in Period 3 (Na-Ar) and in Group 2 (Be-Ba) give evidence for electron configuration in sub-shells and in shells.
Specification Coverage

3.1.1.3 Electron configuration – AQA A Level Chemistry

The following AQA specification points are the ionisation-energy content within 3.1.1.3 Electron configuration.

3.1.1.3 Electron configuration

3.1.1.3
Electron configurations of atoms and ions up to Z = 36 in terms of shells and sub-shells (orbitals) s, p and d.
3.1.1.3
Ionisation energies.
Skills
Students should be able to:
1
define first ionisation energy
2
write equations for first and successive ionisation energies
3
explain how first and successive ionisation energies in Period 3 (Na-Ar) and in Group 2 (Be-Ba) give evidence for electron configuration in sub-shells and in shells.