Describe the differences in properties between diamond and graphite.

Diamond – The electrons are tightly bound between the atoms. Bonds are difficult to break as they are held firmly together hence diamond has a hard structure. Diamond does not have free electrons to carry the current therefore electricity cannot flow. It is an insulator. Graphite – The carbon atoms are arranged in layers. Not all the bonds between the atoms are strong. The electrons can move freely. Movement of electrons means that graphite is a conductor of electricity. Layers of atoms are not held together very strongly; the layers can slide over each other quite easily therefore is also a good lubricant.