A complete revision and exam practice pack for SC5b Ionic Lattices, covering C0.1, C1.25–C1.27.

Topic Mastery Sheet (PDF) - a comprehensive student reference covering the naming of ionic compounds and their giant lattice structures. The –ide/–ate naming rule is explained from first principles: –ide endings indicate an anion containing only one element (NaCl = sodium chloride); –ate endings indicate an anion containing oxygen and another non-metal (NaClO₃ = sodium chlorate). A table of polyatomic ions covers hydroxide, nitrate, carbonate, sulfate and ammonium with their formulae and charges. The formula-writing section teaches the charge-crossing method systematically, with worked examples for CaCl₂, Al₂O₃, Na₂CO₃ and Mg(NO₃)₂ - showing why brackets are needed for polyatomic ions. The lattice section explains the 3D structure of NaCl - each Na⁺ surrounded by 6 Cl⁻ and vice versa - and why strong electrostatic forces act in all directions simultaneously. A comparison explains why MgO has a much higher melting point than NaCl: the 2+/2− charges produce far stronger forces than 1+/1−. The stretch section covers coordination numbers, different lattice geometries, and lattice energy as a quantitative measure of ionic bond strength.

Student Exam Practice Sheet (PDF + DOCX) - six questions (13 marks) including group 6 ion MCQ, –ide/–ate naming explanation, four ionic formula calculations, lattice structure description, forces holding the lattice together, and why MgO melts at a higher temperature than NaCl.

Teacher Answer Key (PDF + DOCX) - full tick-point mark scheme with examiner notes.

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