Stereoisomer:Isomers that have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space.
Alkane:A hydrocarbon compound consisting only of hydrogen and carbon atoms arranged in a tree-like structure (acyclic) without any branches or rings, connected by single bonds.
Functional Group:A specific group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule