A student says that diamond is hard because its covalent bonds are the strongest bonds in chemistry. Which statement is the best correction to what the student says?
Diamond is hard because each atom is held by four bonds in different directions.
Diamond is hard because its covalent bonds are stronger than ionic bonds in salts.
Diamond is hard because its separate molecules are packed very tightly together.
Diamond is hard because the forces holding its layers together are very strong.
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.