Edexcel GCSE Chemistry revision

Topic 1: Key concepts in chemistry

There are 12 parts: we start with development of the model of the atom (Dalton to Bohr and Chadwick), and finish with reacting masses, concentration and yield.

1. 1.1Development of the model of the atom (Dalton to Bohr and Chadwick)66 questions
2. 1.2Atoms, elements and isotopesFree 58 questions
3. 1.3Relative atomic mass and isotopic abundance31 questions
4. 1.4Electronic structure and electron configurations66 questions
5. 1.5Development of the periodic table and metals versus non-metals71 questions
6. 1.6Ionic, covalent and metallic bondingFree 21 questions
7. 1.7Structures and properties of materials25 questions
8. 1.8Writing and balancing chemical equations, state symbols and ionic equations43 questions
9. 1.9Relative formula mass, percentage composition and empirical and molecular formulae47 questions
10. 1.10Conservation of mass and the moleFree 59 questions
11. 1.11Limiting reactants and using moles to balance equations52 questions
12. 1.12Reacting masses, concentration and yield62 questions

Topic 2: States of matter and mixtures

There are 6 parts: we start with states of matter, the particle model and changes of state, and finish with the practical on analysis and purification of water samples.

1. 2.1States of matter, the particle model and changes of state70 questions
2. 2.2Mixtures and separation techniques (filtration, crystallisation, simple and fractional distillation)77 questions
3. 2.3Purity, formulations and chromatographyFree 63 questions
4. 2.4Required practical: paper chromatography, Rf values and analysis of inks65 questions
5. 2.5Earth's resources and potable waterFree 27 questions
6. 2.6Required practical: analysis and purification of water samples65 questions

Topic 3: Chemical changes

There are 5 parts: we start with strong and weak acids, pH and hydrogen ion concentration, and finish with the practical on electrolysis of aqueous solutions.

1. 3.1Strong and weak acids, pH and hydrogen ion concentration51 questions
2. 3.2Solubility rules and precipitation reactions21 questions
3. 3.3Required practical: preparing a pure, dry sample of a soluble salt21 questions
4. 3.4Acids, bases and electrolysis37 questions
5. 3.5Required practical: electrolysis of aqueous solutions64 questions

Topic 4: Extracting metals and equilibria

There are 5 parts: we start with reactivity of metals and extraction, and finish with reversible reactions and equilibrium.

1. 4.1Reactivity of metals and extractionFree 25 questions
2. 4.2Oxidation and reduction (redox) in terms of oxygen, electrons and displacement59 questions
3. 4.3Sustainable metal extraction: bioleaching, phytomining and recycling metals26 questions
4. 4.4Life cycle assessment and recycling20 questions
5. 4.5Reversible reactions and equilibrium19 questions

Topic 5: Separate chemistry 1

There are 9 parts: we start with transition metals, and finish with cells and fuel cells.

1. 5.1Transition metals: properties and uses22 questions
2. 5.2Corrosion, rusting and its prevention31 questions
3. 5.3Alloys, ceramics, composites and polymers as materials47 questions
4. 5.4Atom economy56 questions
5. 5.5Molar volume and calculations involving gases56 questions
6. 5.6Required practical: acid–alkali titration and titration calculations58 questions
7. 5.7The Haber process and choosing industrial conditions62 questions
8. 5.8Fertilisers and NPK compounds29 questions
9. 5.9Cells and fuel cells22 questions

Topic 6: Groups in the periodic table

There are 3 parts: we start with the periodic table and groups, and finish with groups 7 and 0.

1. 6.1The periodic table and groups67 questions
2. 6.2Group 1: the alkali metals and their reactions35 questions
3. 6.3Groups 7 and 0: the halogens, displacement reactions and the noble gases60 questions

Topic 7: Rates of reaction and energy changes

There are 7 parts: we start with rates of reaction, and finish with reaction profiles, activation energy and bond energy calculations.

1. 7.1Rates of reactionFree 63 questions
2. 7.2Calculating rates of reaction: mean rates and tangents on graphs62 questions
3. 7.3Required practical: rate of reaction by gas volume or mass loss66 questions
4. 7.4Required practical: rate of reaction by turbidity (sodium thiosulfate and hydrochloric acid)53 questions
5. 7.5Exothermic and endothermic reactionsFree 57 questions
6. 7.6Required practical: investigating temperature changes in reacting solutions59 questions
7. 7.7Reaction profiles, activation energy and bond energy calculations54 questions

Topic 8: Fuels and Earth science

There are 6 parts: we start with crude oil and hydrocarbons, and finish with atmospheric pollutants.

1. 8.1Crude oil and hydrocarbonsFree 26 questions
2. 8.2Cracking of hydrocarbons: catalytic and steam cracking22 questions
3. 8.3Evolution of the Earth's atmosphere27 questions
4. 8.4The atmosphere and climate changeFree 23 questions
5. 8.5Carbon footprint and reducing greenhouse gas emissions68 questions
6. 8.6Atmospheric pollutants19 questions

Topic 9: Separate chemistry 2

There are 8 parts: we start with identifying gases and ions, and finish with nanoparticles.

1. 9.1Identifying gases and ions65 questions
2. 9.2Required practical: identifying unknown ions (flame tests, precipitates, anion tests)24 questions
3. 9.3Instrumental methods and flame emission spectroscopy24 questions
4. 9.4Alkenes, alcohols and polymers26 questions
5. 9.5Carboxylic acids and esters34 questions
6. 9.6Condensation polymerisation (polyesters and polyamides)32 questions
7. 9.7Naturally occurring polymers: amino acids, proteins, DNA, starch and cellulose51 questions
8. 9.8Nanoparticles: properties, uses and risks20 questions

Topic S: Practical and maths skills

There are 6 parts: we start with models, theories and evidence in chemistry, and finish with chemistry calculations.

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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