In diamond, what happens to the four outer electrons of each carbon atom?
They are all lost so that each carbon atom becomes a positive ion.
Three are used in covalent bonds and one of them is delocalised.
They are all delocalised and can move throughout the structure.
They are all used to form covalent bonds with other carbon atoms.
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.