Master Topic C2 of OCR Gateway Science A GCSE Chemistry (J248): elements, compounds, mixtures and purity; separating mixtures by filtration, crystallisation and distillation; paper chromatography and Rf values; the development and structure of the periodic table; the trends of the alkali metals, halogens and noble gases; the transition metals; ionic, covalent and metallic bonding; simple molecular, giant covalent and giant ionic structures; and nanoparticles. Worked examples, required-practical method steps, exam tips and graded model answers for Foundation and Higher tiers.
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