acid acidity agent alkali alkalinity alloisomer antacid atom base biochemical cation chemical chemical element chromoisomer compound copolymer dimer electrocoating electroetching electrogalvanization electrogilding electrograving electrolysis electrolyte electroplating element galvanization heavy chemicals high polymer homopolymer hydracid inorganic chemical ion ionization ionogen isomer macromolecule metamer molecule monomer neutralizer nonacid nonelectrolyte organic chemical oxyacid polymer pseudoisomer radical reagent sulfacid trimer