Macromolecules

Macromolecules

1. Diamond

   • Each carbon atom
     • >Strongly bonded to 4 other carbon atoms
       • >In Giant 3D lattice structure
   • Hard
     • Drills
     • Cutting tools
   • Don't conduct electricity
     • No charged Particles of free electrons
   • High melting and Boiling Point.

2. Graphite

   • Each Carbon atom
     • >Strongly bonded to 3 other carbon atoms
       • >turning layers of hexagon
   • Weak Forces of Attraction
     • Between layers
       • So can slide over each other
   • Used as:
     • Pencil leads
     • lubricant
   • 3 of outer electrons in each carbon atom.
     • used to make the covalent bonds
   • The fourth electron
     • delocalised between layers.
     • Delocalised Electrons
       • Allows graphite to conduct electricity.
       • High Melting and Boiling Point
         • Strong Covalent Bonds
         • Giant Structure

3. Silicon Dioxide (Sand)

   • 3D structure like Diamond
   • Silicon and oxygen atoms bonded together strongly.
   • High Melting and Boiling Point
   • NEVER conducts electricity.