Ex 1. - 4 ways that carbon skeletons can vary
a.) Length (examples: Ethane, Propane) -May vary in length
b.) Branching (examples: Butane, 2-Methylpropane) -Skeletons maybe unbranched or branched
c.) Double bond position (examples: 1-Butane, 2-Butane) -Maybe have double bonds, can vary in location
d.) Presence of ring (examples: Cyclohexane, Benzene) - the abbreviated structural formula for each compound, each corner represents a carbon and its attached hydrogens.