Group (chemistry)

Periodic table group: A group or family in the periodic table refers to the collection of elements in a column (vertical) in the periodic table. These elements usually share similar characteristics, because of similar electron configurations. For instance, the noble gases form Group Zero of the periodic table, and they share the attribute of being highly unreactive due to a stable electronic configuration.

No subject wiki entry.

Also located at: Wikipedia:Periodic table group

Functional group: A collection of atoms in a molecule of an organic compound (with a specific pattern of bonds between them) that is responsible for making the organic compound undergo certain characteristic reactions. It may also influence the reactivity of the molecule as a whole.

No subject wiki entry

Also located at: Wikipedia:Functional group, Britannica:Functional group