2. Compare a saturated hydrocarbon and an unsaturated hydrocarbon each with 3 carbon atoms by drawing them in the table below. Remember, saturated refers to the number of hydrogen atoms bonded to the molecule - if the molecule has the largest possible number of hydrogen atoms bonded to it, it must have all single bonds and is saturated with hydrogen atoms. Put one double bond between two of the carbon atoms in the unsaturated hydrocarbon. .