# Graphene is a single layer of graphite. Describe the structure and bonding in graphene and explain why graphene is able to conduct electricity.

> AQA GCSE Chemistry (8462) — 4.2.3 Structure and bonding of carbon · Describe · 4 marks

## Mark scheme (4 marks)

1. Each carbon atom forms three covalent bonds with three other carbon atoms
2. Graphene consists of a single layer of carbon atoms arranged in hexagonal rings
3. Each carbon atom has one delocalised electron (not used in covalent bonding)
4. These delocalised electrons are free to move and carry electrical charge / current

## Key terms

- [graphene](https://www.gradenine.co.uk/glossary/graphene)

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Source: [GradeNine](https://www.gradenine.co.uk/q/graphene-is-a-single-layer-of-b8dd7095) · Published by Druglandscape Ltd.