- Atoms of some elements ca form several covalent bonds. These atoms can join together in gaint covalent structures (sometimescalled macromolecules). Every atom in the structures is joined to several other atoms by strong covalent bonds. It takes an enormous amount of energy to break down the lattice and so these substances have very high melting points.
- Diamond is a form of carbon that has a regular three - dimensional giant structure. Every carbon atom is covalently bonded to four other carbon atoms. This makes diamond hard and transparent. The compound silicon dioxide (silica) has a similar structure.
- Graphie is a form of carbon in…