Write the names and structural formulae of all the possible isomers of hexane.

23 Why does carbon form compounds mainly by covalent bonding? 24 What is meant by catenation? Name two elements which exhibit the property of catenation. 25 What is buckminsterfullerence? How is it related to diamond and graphite? 25 Why is diamond used for making cutting tools (lie glass cutters) but graphite is not?