Cambridge IGCSE Chemistry (0620) develops understanding of the material world at the atomic and molecular level. Students learn both theory and practical skills that prepare them for A Level Chemistry or IB DP Chemistry.
States of matter: particle model, changes of state. Atomic structure: protons, neutrons, electrons, isotopes, electronic configuration. Bonding: ionic, covalent, metallic — properties linked to structure. Stoichiometry: formula, equations, mole concept, reacting masses. Energetics: exothermic/endothermic, energy diagrams. Rates: collision theory, effect of concentration, temperature, catalyst, surface area. Acids & bases: pH scale, neutralisation, preparation of salts. Organic chemistry: alkanes, alkenes, alcohols, carboxylic acids, polymers.
Extra: electron configurations with sub-shells, molar volume, titration calculations, rate graphs, equilibrium, transition metals, more organic chemistry (esters, amino acids, addition/condensation polymerisation), electrolysis calculations.
Assessment: Paper 1 (MCQ), Paper 2 (Core structured), Paper 4 (Extended structured), Paper 5/6 (practical). Practical skills: safe handling of chemicals, heating, measuring, observation, recording, analysis. Drawing apparatus diagrams and results tables neatly scores marks.
Focus on understanding concepts (not just memorising). Practise calculations (moles, reacting masses, titrations). Learn to write balanced equations confidently. Master organic chemistry reaction types and conditions. Do at least 10 past papers under timed conditions. Review examiner reports to understand common mistakes. The A* threshold is typically around 85–90% on Extended papers.
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