Question

define functional group ​

Answer 1

a group of atoms responsible for the characteristic reactions of a particular compound.

Answer 2

Answer:

In organic chemistry, functional groups are specific substituents or moieties or bonds (except double bonds) within molecules that are responsible for the characteristic chemical reactions of those molecules. The same functional group will undergo the same or similar chemical reaction(s) regardless of the size of the molecule it is a part of.[1][2] This allows for systematic prediction of chemical reactions and behavior of chemical compounds and design of chemical syntheses. Furthermore, the reactivity of a functional group can be modified by other functional groups nearby. In organic synthesis, functional group interconversion is one of the basic types of transformations.