This exam focus covers Exam Focus within Giant Covalent Structures for GCSE Chemistry. Revise Giant Covalent Structures in Bonding & Structure for GCSE Chemistry with 21 exam-style questions and 21 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. 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
Giant covalent structures are a high-frequency topic. The diamond/graphite comparison is a classic question:
- Compare diamond and graphite — structure, properties, and explain the differences (4-6 marks)
- Explain why giant covalent structures have high melting points — reference covalent bonds being broken (2 marks)
- Explain why graphite conducts electricity — delocalised electrons moving along layers (2 marks)
- Identify the structure from given properties — very high MP + conducts = graphite (1 mark)
- Higher tier: Fullerenes/graphene — structure and uses in medicine, electronics (2-3 marks)
Edexcel 1CH0: Examined in Paper 1 (1CH0/1). The diamond vs graphite comparison is a staple Edexcel question — students must explain why diamond is hard (four covalent bonds, tetrahedral structure) and why graphite conducts electricity (delocalised electrons between layers). Fullerenes and graphene uses are also examined at higher tier. In Edexcel-style questions, the command word "Suggest" appears frequently — use your chemistry knowledge to apply to an unfamiliar context.
Practice questions for Giant Covalent Structures
Why do giant covalent structures have very high melting points?
Explain why graphite conducts electricity but diamond does not.