Functional group, in the world of trends, refers to a plethora of weighty terms that are sure to impress your chemist friends. These are the terms that'll have your chemistry teacher doing cartwheels and wondering why you weren't her star pupil. Functional group, at its core, is all about understanding the reactive centers in organic molecules. From the unsaturated compounds to the heterocyclic ones, these trends are all about figuring out how the molecules interact with each other, and thus, making it possible to do things like improve health, create new and exciting compounds, and confound your less scientifically inclined friends with your newfound knowledge. Whether you're looking to impress, expand your horizons, or simply geek out, the functional group has got you covered.