Which row shows a property and an explanation of that property for both diamond and silicon(IV) oxide?
- Aproperty: very hard; explanation: diamond has a giant covalent structure and silicon(IV) oxide has a giant ionic structure
- Bproperty: high melting point; explanation: both have giant covalent structures with many strong bonds between the atoms
- Cproperty: good lubricant; explanation: both have layers of atoms, which can slide over each other
- Dproperty: poor conductor; explanation: both contain only non-metal elements and are simple molecules