This exam focus covers Exam Focus within Ionic Compounds for GCSE Chemistry. Revise Ionic Compounds in Bonding & Structure for GCSE Chemistry with 21 exam-style questions and 21 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 10 of 12 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
🎯 Exam Focus
Frequently Examined
Ionic compound properties are examined very frequently. Key question patterns:
- Explain the high melting point of an ionic compound — always reference "many strong electrostatic forces" and "large amount of energy needed" (2-3 marks)
- Explain conductivity — distinguish between solid (no conduction, fixed ions) and molten/dissolved (conducts, free ions) — 2 marks
- Compare two ionic compounds — which has higher melting point and why (ion charges and size) — 2-3 marks
- Brittleness — explain in terms of layer displacement and repulsion — 2 marks
The critical phrase examiners want to see is: "ions are free to move and carry charge" for conductivity questions.
Edexcel 1CH0: Examined in Paper 1 (1CH0/1). Edexcel tests ionic compound properties through explain questions — high melting point (strong electrostatic forces), electrical conductivity (ions free to move when molten or dissolved), and brittleness (layer shift causes repulsion). Distinguishing solid vs molten/dissolved conductivity is a common 2-mark question. In Edexcel-style questions, the command word "Suggest" appears frequently — use your chemistry knowledge to apply to an unfamiliar context.
Practice questions for Ionic Compounds
What type of structure is found in all ionic compounds?
Explain why magnesium oxide conducts electricity when it is molten but not when it is solid.