Giant Covalent

Question 1

Graphite

Answer 1

Weak intermolecular forces between layers = slippery = lubricant
Delocalised electron = free to move carries a charge = electrical conductor
Layers far apart = low density = lightweight
Strong covalent bonds =high melting long
Insoluble

Question 2

Diamond

Answer 2

4 carbon structure very hard
High melting point
Thermal conductor