Revision portal
GCSE Chemistry
Topic maps, in-depth guides and exam-style practice — organised by the same strands your course uses. Browse by area below or jump into a featured guide.
Revise by topic area
Each area links to a dedicated hub with every guide we publish in that strand — plus a shortcut to the full curriculum list.
Required practicals
Exam-board aligned guides: aim, method, variables, equipment, common mistakes and how to interpret results in the exam — grouped by topic on the hub.
Acid–alkali titration
To find the concentration of an acid or alkali by titrating against a standard solution, using a suitable indicator and correct technique.
Electrolysis practical
To observe electrolysis of an aqueous ionic compound, identify products at each electrode, and link to ion discharge rules.
Rate of reaction
To investigate how surface area or concentration affects the rate of a gas-producing reaction, using initial rate or loss of mass over time.
Featured guides
Atomic Structure & Periodic Table
Atoms, Elements & Compounds
Atoms are the fundamental building blocks of all matter.
Atomic Structure & Periodic Table
Mixtures & Separation Techniques
Mixtures consist of two or more substances that are not chemically combined.
Atomic Structure & Periodic Table
Development of the Atomic Model
The model of the atom has evolved over time.
Atomic Structure & Periodic Table
Subatomic Particles
Atomic Structure questions usually become easier once you stop seeing protons, neutrons, electrons, atoms, ions, and isotopes as six separate facts.
Atomic Structure & Periodic Table
Electronic Structure & Periodic Table
The electronic structure of an atom describes the arrangement of its electrons in energy levels or shells.
Atomic Structure & Periodic Table
Groups & Periods
The periodic table is organized into vertical columns called groups and horizontal rows called periods.
Atomic Structure & Periodic Table
Metals, Non-Metals & Noble Gases
Elements can be classified as metals, non-metals, or metalloids based on their properties.
Bonding & Structure
Ionic Bonding
Ionic Bonding is best understood as electron transfer followed by electrostatic attraction.
How to use this hub
- Pick a topic area you are weakest on — use your mocks or class tests to decide.
- Read the guide, then attempt practice questions without looking back at notes.
- Review mistakes using our mistake prompts, then move to the next guide in the same area.