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GCSE Chemistry · Learn
43 lessons in 8 units, about 65 h 15 min of reading and core practice. Each lesson ends with a quick check.
Specification
Unit 1
Foundational ideas about particles, atoms, ions and the organisation of the periodic table that underpin all later chemistry.
5 lessons · 6 h 30 min of study · ≈12% of the test
Unit 2
How bonding and structure determine the physical properties, uses and limitations of substances and materials.
5 lessons · 7 h of study · ≈12% of the test
Unit 3
Chemical calculations linking formulae, equations, amounts of substance and measured data.
6 lessons · 10 h 15 min of study · ≈17% of the test
Unit 4
Acids, redox, metals and electrolysis explain many laboratory reactions and industrial processes.
6 lessons · 9 h 15 min of study · ≈17% of the test
Unit 5
This unit links energy transfer, reaction speed and reversibility to particle-level explanations and industrial control.
6 lessons · 9 h 15 min of study · ≈14% of the test
Unit 6
Key patterns in groups of the periodic table and the large-scale manufacture and use of important inorganic chemicals.
4 lessons · 6 h of study · ≈9% of the test
Unit 7
Carbon compounds are studied through fuels, hydrocarbons, reactions of homologous series and polymer formation.
5 lessons · 7 h 30 min of study · ≈10% of the test
Unit 8
Students learn how chemists identify substances, evaluate data and apply chemistry to air, water, resources and laboratory work.
6 lessons · 9 h 30 min of study · ≈9% of the test
Start here
Atomic structure and periodicity · Lesson 1 of 5
This topic covers the particle model of solids, liquids and gases; the distinction between elements, compounds and mixtures; and physical separation methods. Exams test precise use of definitions, interpretation of particle diagrams, and application of separation techniques to simple laboratory and industrial contexts.
1 h 30 min of study≈3% of the test
Start the first lessonSign in to keep your place and see your mastery on every topic.
Every lesson is free to read. With an account, finished lessons are ticked off, quick checks feed your mastery, and flashcards come back for review.
Strategy, scoring and test day, beyond the syllabus.
Learn, then practise
Each lesson ends with three quick questions. For more, practice adapts to the topics you’re weakest on.
Open practice