3.2.1
Periodicity
AQA 3.2.1 introduces periodicity through the classification of elements and the physical properties of Period 3 elements. These pages cover s, p, d and f block classification, trends in atomic radius, first ionisation energy and melting point, and how these trends are explained using structure and bonding.
Revision Notes
Work through each part of AQA 3.2.1 in a structured sequence.
a Period
Trends in a Period
Trends in atomic radius, first ionisation energy and melting point across Period 3 from sodium to argon.
Start revisinga Group
Trends in a Group
Key group trends, including atomic radius and first ionisation energy, linked to shells and shielding.
Start revisingTrends
Periodic Trends
Classification of elements and the wider patterns in atomic radius, ionisation energy and melting point.
Start revising3.2.1 Periodicity – AQA A Level Chemistry
The following AQA specification points outline the knowledge and skills students are expected to demonstrate for Periodicity.
3.2.1 Periodicity
An element is classified as s, p, d or f block according to its position in the Periodic Table, which is determined by its proton number.
The trends in atomic radius, first ionisation energy and melting point of the elements Na-Ar.
The reasons for these trends in terms of the structure of and bonding in the elements.
3.2.1 Periodicity – AQA A Level Chemistry
The following AQA specification points outline the knowledge and skills students are expected to demonstrate for Periodicity.
3.2.1 Periodicity
An element is classified as s, p, d or f block according to its position in the Periodic Table, which is determined by its proton number.
The trends in atomic radius, first ionisation energy and melting point of the elements Na-Ar.
The reasons for these trends in terms of the structure of and bonding in the elements.
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