A design team is choosing a carbon material for an electrical component. The component must contain a contact that carries an electric current. The table gives information about the bonding in two materials.
| Material | Bonding information |
|---|---|
| P | Each carbon atom is bonded to three others in a single layer. |
| Q | Each carbon atom is bonded to four others in a three-dimensional structure. |
Explain which material should be chosen and why the other material is not suitable.
122 exam-style questions on OCR GCSE Chemistry 2.3 Properties of materials, covering 2.3.1 Carbon bonding and the variety of organic compounds, 2.3.2 Diamond, graphite, fullerenes and graphene, 2.3.3 Bond strength, changes of state and predicting states, 2.3.4 Bulk properties and types of bonding, and 2.3.5 Nanoparticles: scale, surface area, uses and risks. Each one has a worked solution and a mark scheme showing where the marks go.