AQA GCSE Chemistry revision

Topic 1: Atomic structure and the periodic table

There are 10 parts: we start with atoms, elements and isotopes, and finish with transition metals.

1. 1.1Atoms, elements and isotopesFree 58 questions
2. 1.2Mixtures and separation techniques (filtration, crystallisation, simple and fractional distillation)77 questions
3. 1.3Development of the model of the atom (Dalton to Bohr and Chadwick)66 questions
4. 1.4Relative atomic mass and isotopic abundance31 questions
5. 1.5Electronic structure and electron configurations66 questions
6. 1.6Development of the periodic table and metals versus non-metals71 questions
7. 1.7The periodic table and groups67 questions
8. 1.8Group 1: the alkali metals and their reactions35 questions
9. 1.9Groups 7 and 0: the halogens, displacement reactions and the noble gases60 questions
10. 1.10Transition metals: properties and uses22 questions

Topic 2: Bonding, structure and the properties of matter

There are 4 parts: we start with ionic, covalent and metallic bonding, and finish with nanoparticles.

1. 2.1Ionic, covalent and metallic bondingFree 21 questions
2. 2.2States of matter, the particle model and changes of state70 questions
3. 2.3Structures and properties of materials25 questions
4. 2.4Nanoparticles: properties, uses and risks20 questions

Topic 3: Quantitative chemistry

There are 7 parts: we start with conservation of mass and the mole, and finish with molar volume and calculations involving gases.

1. 3.1Conservation of mass and the moleFree 59 questions
2. 3.2Writing and balancing chemical equations, state symbols and ionic equations43 questions
3. 3.3Relative formula mass, percentage composition and empirical and molecular formulae47 questions
4. 3.4Limiting reactants and using moles to balance equations52 questions
5. 3.5Reacting masses, concentration and yield62 questions
6. 3.6Atom economy56 questions
7. 3.7Molar volume and calculations involving gases56 questions

Topic 4: Chemical changes

There are 7 parts: we start with reactivity of metals and extraction, and finish with the practical on electrolysis of aqueous solutions.

1. 4.1Reactivity of metals and extractionFree 25 questions
2. 4.2Oxidation and reduction (redox) in terms of oxygen, electrons and displacement59 questions
3. 4.3Required practical: preparing a pure, dry sample of a soluble salt21 questions
4. 4.4Required practical: acid–alkali titration and titration calculations58 questions
5. 4.5Strong and weak acids, pH and hydrogen ion concentration51 questions
6. 4.6Acids, bases and electrolysis37 questions
7. 4.7Required practical: electrolysis of aqueous solutions64 questions

Topic 5: Energy changes

There are 4 parts: we start with exothermic and endothermic reactions, and finish with cells and fuel cells.

1. 5.1Exothermic and endothermic reactionsFree 57 questions
2. 5.2Required practical: investigating temperature changes in reacting solutions59 questions
3. 5.3Reaction profiles, activation energy and bond energy calculations54 questions
4. 5.4Cells and fuel cells22 questions

Topic 6: The rate and extent of chemical change

There are 5 parts: we start with rates of reaction, and finish with reversible reactions and equilibrium.

1. 6.1Rates of reactionFree 63 questions
2. 6.2Calculating rates of reaction: mean rates and tangents on graphs62 questions
3. 6.3Required practical: rate of reaction by gas volume or mass loss66 questions
4. 6.4Required practical: rate of reaction by turbidity (sodium thiosulfate and hydrochloric acid)53 questions
5. 6.5Reversible reactions and equilibrium19 questions

Topic 7: Organic chemistry

There are 6 parts: we start with crude oil and hydrocarbons, and finish with naturally occurring polymers.

1. 7.1Crude oil and hydrocarbonsFree 26 questions
2. 7.2Cracking of hydrocarbons: catalytic and steam cracking22 questions
3. 7.3Alkenes, alcohols and polymers26 questions
4. 7.4Carboxylic acids and esters34 questions
5. 7.5Condensation polymerisation (polyesters and polyamides)32 questions
6. 7.6Naturally occurring polymers: amino acids, proteins, DNA, starch and cellulose51 questions

Topic 8: Chemical analysis

There are 5 parts: we start with purity, formulations and chromatography, and finish with instrumental methods and flame emission spectroscopy.

1. 8.1Purity, formulations and chromatographyFree 63 questions
2. 8.2Required practical: paper chromatography, Rf values and analysis of inks65 questions
3. 8.3Identifying gases and ions65 questions
4. 8.4Required practical: identifying unknown ions (flame tests, precipitates, anion tests)24 questions
5. 8.5Instrumental methods and flame emission spectroscopy24 questions

Topic 9: Chemistry of the atmosphere

There are 4 parts: we start with evolution of the Earth's atmosphere, and finish with atmospheric pollutants.

1. 9.1Evolution of the Earth's atmosphere27 questions
2. 9.2The atmosphere and climate changeFree 23 questions
3. 9.3Carbon footprint and reducing greenhouse gas emissions68 questions
4. 9.4Atmospheric pollutants19 questions

Topic 10: Using resources

There are 8 parts: we start with earth's resources and potable water, and finish with fertilisers and NPK compounds.

1. 10.1Earth's resources and potable waterFree 27 questions
2. 10.2Required practical: analysis and purification of water samples65 questions
3. 10.3Sustainable metal extraction: bioleaching, phytomining and recycling metals26 questions
4. 10.4Life cycle assessment and recycling20 questions
5. 10.5Corrosion, rusting and its prevention31 questions
6. 10.6Alloys, ceramics, composites and polymers as materials47 questions
7. 10.7The Haber process and choosing industrial conditions62 questions
8. 10.8Fertilisers and NPK compounds29 questions

Topic S: Working scientifically and maths skills

Working scientifically and maths skills are tested throughout every chemistry paper, so this topic can earn you a lot of marks.

We will look at how models and theories develop, how to plan investigations and use apparatus safely, and how to present data in tables and graphs.

Then we cover uncertainty and evaluation, and the calculations you need: ratios, percentages, unit conversions and rearranging equations.

1. S.1Models, theories and evidence in chemistryFree 25 questions
2. S.2Planning investigations: variables, hypotheses and risk assessment37 questions
3. S.3Practical techniques and apparatus (measuring, heating, gas collection, safety)73 questions
4. S.4Presenting data: tables, graphs, significant figures and standard form28 questions
5. S.5Uncertainty, accuracy, precision, repeatability and evaluating results36 questions
6. S.6Chemistry calculations: ratios, percentages, unit conversions and rearranging equations44 questions

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