For starters, we need to know how to describe the atoms and bonds that are depicted using line-angle notation. We use a specific language to describe how many carbons are in a molecule and what kinds ...For starters, we need to know how to describe the atoms and bonds that are depicted using line-angle notation. We use a specific language to describe how many carbons are in a molecule and what kinds of functional groups are in a molecule. Watch the video below for a crash course on this language, which will be followed up with more complicated nomenclature. b) number the chain; start with a substituent group occupying the lowest number possible a) count number of carbons in the ring