What everything is made of and why it behaves the way it does.
Chemistry explains why stuff is the way it is. Why does metal rust? Why does baking soda fizz? How do batteries work? It's the science of materials, reactions, and the building blocks of literally everything. Once you get it, you start seeing chemistry everywhere.
The only letter not in the periodic table is J.
Lightning strikes produce ozone (O₃), which is that fresh smell after a storm.
Your phone screen is made using rare earth elements — chemistry made your phone possible.
Diamond and pencil graphite are both pure carbon. Same atoms, totally different arrangement.
65 topics across 10 units — all mapped to the AQA GCSE specification.
Atoms, elements, compounds, electron structure, groups 1/7/0 and transition metals.
Ionic, covalent and metallic bonding, giant structures, nanoparticles and properties of materials.
Conservation of mass, relative formula mass, moles, balancing equations, concentration and yield.
Reactivity series, metal extraction, oxidation/reduction, acids, bases and electrolysis.
Exothermic/endothermic reactions, reaction profiles, bond energies, cells and fuel cells.
Rates of reaction, collision theory, catalysts, reversible reactions and Le Chatelier's principle.
Crude oil, hydrocarbons, fractional distillation, alkanes, alkenes, polymers and functional groups.
Purity, chromatography, gas tests, flame tests, metal hydroxide tests and instrumental methods.
Atmospheric composition, greenhouse gases, climate change, carbon footprint and pollutants.
Sustainability, potable water, waste treatment, life cycle assessments and the Haber process.
Doesn't just give you the answer — walks you through it step by step so you can do it yourself in the exam.
Stuck on a homework problem? Confused by a concept? Ask in your own words — no such thing as a stupid question.
See exactly which topics you've nailed and which need more work. XP, streaks and mastery scores for every topic.
Practice with questions modelled on real GCSE papers. Marks, hints and model answers included.
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