Buckminsterfullerene does not conduct electricity but graphene does, although in both of them each carbon atom forms three covalent bonds. Which statement explains this difference?
Electrons cannot pass between the separate molecules of buckminsterfullerene.
Buckminsterfullerene has no delocalised electrons because it is only a molecule.
Buckminsterfullerene has four bonds per carbon atom, so it has no spare electron.
The carbon atoms in buckminsterfullerene are held by weak forces, not by bonds.
40 exam-style questions on AQA GCSE Chemistry 2.3 Structure and bonding of carbon, covering 2.3.1 Diamond, 2.3.2 Graphite, and 2.3.3 Graphene and fullerenes. Each one has a worked solution and a mark scheme showing where the marks go.