Benzene is a 6 membered carbon ring with alternating (and resonating) single and double bonds.
Chemistry Vs. Alchemy
Chemistry is the study of matter's molecular structure and how it changes. Alchemy is the study of converting one material to another, typically metal to gold.
IUPAC Nomenclature is a system for naming organic molecules created by the International Union of Pure & Applied Chemistry to provide unique names to molecules.