Giant Covalent structures

• All atoms in Giant covalent structures are linked to other atoms by strong covalent bonds.
• They are solids and have very high melting and boiling points.
• Giant Covalent Structures have very high melting and boiling points because lots of energy is needed to overcome and break the covalent bonds between the atoms.
• Diamond, Graphite and Silicon Dioxide are examples of giant covalent structures.
• Diamond- Each carbon atom forms 4 covalent bonds in a rigid, giant covalent structure.
• Graphite- Each carbon atom forms 3 covalent bonds to create layers of hexagons. Each carbon atom has one delocalised electron.
• Silicon Dioxide can be called silica, which is what sand is made of. Each grain of sand is one giant structure of silicon and oxygen.
• What is the molecular formula of poly(chloroethene)?

  C2H3Cl