acid acidity agent alkali alkalinity alloisomer anion antacid atom base basic cation chemical chemical element chemicobiological chemicoengineering chemicomineralogical chemicophysical chemurgic chromoisomer compound copolymer copolymeric copolymerous dimer dimeric dimerous electrochemical element elemental elementary heavy chemicals heteromerous high polymer homopolymer hydracid inorganic chemical ion isomer isomerous macrochemical macromolecule metamer metameric molecule monomer monomerous neutralizer nonacid organic chemical oxyacid photochemical physicochemical phytochemical polymer polymeric pseudoisomer radical radiochemical reagent sulfacid thermochemical trimer