At one time organic chemistry was the study of compounds derived from living things. Many organic compounds are derived from living things, but not all.
Organic chemistry is the study of the compounds of carbon.
Ca, Co, etc. 4. Hydrocarbons-compounds composed of carbon and hydrogen atoms. The Alkanes-names always end in ANE 1. 3-D like 3. Naming-Based on the longest chain of C atoms in the compound.