Carbon is the most important element to living things because it's able to bond in many different ways and form many essential compounds.
Hydrocarbons are important molecules that can form chains and rings due to the bonding patterns of carbon atoms.
Isomers are molecules with the same chemical formula but have different structures, which creates different properties in the molecules.
Enantiomers share the same chemical structure and bonds but differ in the placement of atoms such that they are mirror images of each other.
Functional groups are groups of molecules that attached to carbon skeletons and give that molecule its specific identity or function.