is a functional group consisting of oxygen It has a charge
(oxidation number) of -1 unit. The term hydroxyl group is used
when the functional group -OH is counted as a substituent of an
organic compound. Organic molecules containing a hydroxyl group
are known as alcohols. Hydroxide is one of the simplest of the
polyatomic ions. a general term for any salt containing
stoichiometric amounts of this polyatomic ion.