GCSE Chemistry Worksheets & Printable Revision PDFs

History of the atom, subatomic particles, isotopes, electron configuration, mixtures separation techniques, and groups 1, 7 & 0.

Ionic bonding lattices, covalent dot-and-cross, giant covalent networks (diamond, graphite, silica), metallic bonding, and fullerenes.

Formula mass ($M_r$), moles-mass equations, reacting mass ratios, percentage yield, atom economy, solution concentrations, and gas volumes.

Reactivity series, metal displacement, acid-base salt preparations, titrations, and molten vs. aqueous electrolysis rules (half equations).

Exothermic vs endothermic reactions, reaction profile diagrams, activation energy, and bond energy calculations ($\Delta H = ext{Bonds Broken} - ext{Bonds Formed}$).

Collision theory, measuring rate (gas syringes, turbidity), tangents & instantaneous rates, catalysts, and Le Chatelier's Principle in reversible reactions.

Crude oil fractional distillation, cracking, alkanes, alkenes addition reactions, alcohols, carboxylic acids, and addition vs condensation polymers.

Paper chromatography ($R_f$ values), common gas tests ($O_2, H_2, CO_2, Cl_2$), flame tests, and precipitate tests for cations ($Al^{3+}, Ca^{2+}, Cu^{2+}, Fe^{2+}, Fe^{3+}$) and anions.

Evolution of the Earth's early atmosphere, greenhouse effect, global climate change, and atmospheric pollutants ($CO, SO_2, NO_x$, particulates).

Potable water purification, desalination, wastewater treatment stages, Life Cycle Assessments (LCAs), recycling metals, and Haber process economics.