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Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Define and use the terms: (a) enthalpy change of atomisation, ΔHat; (b) lattice energy, ΔHlatt (the change from gas-phase ions to a solid lattice).
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(a) Define and use the term first electron affinity, EA; (b) explain the factors affecting the electron affinities of elements; (c) describe and explain the trends in the electron affinities of the Group 16 and Group 17 elements.
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Construct and use Born–Haber cycles for ionic solids.
Limited to +1 and +2 cations and –1 and –2 anions.
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Carry out calculations involving Born–Haber cycles.
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Explain, in qualitative terms, the effect of ionic charge and of ionic radius on the numerical magnitude of a lattice energy.
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