This document summarizes the contributions of several important chemists throughout history. Some of the chemists discussed include Michael Faraday who discovered benzene and invented the Bunsen burner, Antoine Lavoisier who established the metric system and helped reform chemical nomenclature, Amedeo Avogadro who formulated Avogadro's law relating amounts of gases to moles, and Marie Curie who was the first person to win Nobel Prizes in two fields and discovered radium and polonium. The document provides brief biographies of these scientists and their significant scientific discoveries and advances in chemistry.