Chemistry
GCSE · WJEC / Eduqas
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View topicsWJEC GCSE Chemistry is examined in two written papers with a practical assessment component, and forms part of the separate-science route in Wales alongside Biology and Physics.
Content covers atomic structure and the periodic table, ionic, covalent and metallic bonding, the mole and reacting-mass calculations, acids, bases and salts, rates of reaction, energy changes, electrolysis, organic chemistry, the Earth's atmosphere and resources, and chemical analysis.
Calculation questions (moles, concentration, percentage yield and atom economy) are where grades are most often won or lost. They respond very well to structured, repeated 1-on-1 practice with feedback on setting out working.
Important Topics
- Atomic Structure & the Periodic TableAtoms, isotopes, electron arrangement, groups and periodic trends.
- Bonding & StructureIonic, covalent and metallic bonding and how structure determines properties.
- Quantitative ChemistryThe mole, reacting masses, concentration, percentage yield and atom economy.
- Acids, Bases & ElectrolysispH, neutralisation, salt preparation, titration and electrolysis products.
- Rates & Energy ChangesFactors affecting rate, collision theory, exothermic and endothermic reactions.
- Organic ChemistryCrude oil, alkanes, alkenes, alcohols, carboxylic acids and polymers.
- Earth, Atmosphere & AnalysisAtmospheric change, resources, water treatment and chemical tests.
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