Loading…
Loading…
GCSE Combined Science · key term
A form of carbon with a giant covalent structure consisting of layers of hexagonal rings. Each carbon atom bonds to three others and contributes one delocalised electron.
Used by AQA
Specification 5.2.3.2 · Paper 3
Revise: Properties of GraphiteGraphite is a form of the element carbon. It is the material in pencil ‘lead’, despite containing no lead metal. Its softness and ability to conduct electricity can both be explained by the way its carbon atoms are arranged and bonded.
For electrical conduction, state that delocalised electrons are free to move and carry charge. Carbon atoms do not move through the graphite to carry the current.
Do not describe graphite as having weak covalent bonds. Its covalent bonds are strong, and there are no covalent bonds between its layers.
Graphite has delocalised electrons like a metal, but it has a giant covalent structure, not metallic bonding.
Create a free account to read GCSE Combined Science revision notes for your exam board and track your progress.