Polyatomic

A **polyatomic ion** is a charged species composed of two or more atoms covalently bonded or of a metal complex that can be considered as acting as a single unit in the context of acid and base chemistry or in the formation of salts. Ions of two atoms are commonly referred to as polyatomic. Note, a polyatomic ion is also referred to in older works as a radical. In current usage the term radical refers to free radicals which are uncharged species with an unpaired electron.


 * __List of Polyatomic Ions__**
 * ~ Polyatomic ions ||
 * Acetate || CH3COO− or C2H3O2− ||
 * Aluminate || AlO2−, Al2O42− ||
 * Amide || NH2− ||
 * Ammonium || NH4+ ||
 * Antimonate || SbO43− ||
 * Antimonite || SbO33− ||
 * Arsenate || AsO43− ||
 * Arsenite || AsO33− ||
 * Azide || N3− ||
 * Benzoate || C6H5COO− ||
 * Bicarbonate (hydrogen carbonate) || HCO3− ||
 * Borate || BO33− ||
 * Metaborate || BO2− ||
 * Tetraborate || B4O72− ||
 * Bromate || BrO3− ||
 * Bromite || BrO2− ||
 * Carbide || C22− ||
 * Carbonate || CO32− ||
 * Chlorate || ClO3− ||
 * Chlorite || ClO2− ||
 * Chromate || CrO42− ||
 * Chromite || CrO2− ||
 * Chromyl || CrO22+ ||
 * Citrate || C6H5O73− ||
 * Cyanate || OCN− ||
 * Cyanide || CN− ||
 * Dichromate || Cr2O72− ||
 * Dihydrogen arsenate || H2AsO4− ||
 * Dihydrogen phosphate || H2PO4− ||
 * Dihydrogen phosphite || H2PO3− ||
 * Dioxygenyl || O2+ ||
 * Disulfide || S22− ||
 * Ferrate || FeO42− ||
 * Ferricyanide || Fe(CN)63− ||
 * Ferrocyanide || Fe(CN)64− ||
 * Formate (formiate) || HCO2− ||
 * Fulminate || CNO− ||
 * Hydrazide || N2H3− ||
 * Hydrogen carbonate (bicarbonate) || HCO3− ||
 * Hydrogen arsenate || HAsO42− ||
 * Hydrogen phosphate || HPO42− ||
 * Hydrogen phosphite || HPO32− ||
 * Hydrogen sulfate || HSO4− ||
 * Hydrogen sulfite || HSO3− ||
 * Hydrogen telluride || HTe− ||
 * Hydronium || H3O+ ||
 * Hydroxide || OH− ||
 * Hypobromite || BrO− ||
 * Hypochlorite || ClO− ||
 * Hypoiodite || IO− ||
 * Hypophosphite || PO23− ||
 * Hyposulfite || SO22− ||
 * Periodate || IO4− ||
 * Iodate || IO3− ||
 * Triiodide || I3− ||
 * Iodite || IO2− ||
 * Isocyanate || NCO− ||
 * Mercury(I) || Hg22+ ||
 * Manganate || MnO42− ||
 * Molybdate || MoO42− ||
 * Nitrate || NO3− ||
 * Nitrite || NO2− ||
 * Oxalate || C2O42− ||
 * Ozonide || O3− ||
 * Perbromate || BrO4− ||
 * Perchlorate || ClO4− ||
 * Permanganate || MnO4− ||
 * Peroxide || O22− ||
 * Perrhenate || ReO4− ||
 * Peroxomonosulfate || SO52− ||
 * Peroxodisulfate || S2O82− ||
 * Pertechnetate || TcO4− ||
 * Phosphate || PO43− ||
 * Phosphite || PO33− ||
 * Plumbate || PbO32− ||
 * Plumbite || PbO22− ||
 * Pyridinium || C5H6N+ ||
 * Pyrophosphate || P2O74− ||
 * Pyrylium || C5H5O+ ||
 * Quaternary ammonium || NR4+ ||
 * Selenate || SeO42− ||
 * Selenite (ion) || SeO32− ||
 * Silicate || SiO32− ||
 * Disilicate || Si2O52− ||
 * Metasilicate || SiO32− ||
 * Orthosilicate || SiO44− ||
 * Pyrosilicate || Si2O76− ||
 * Stannate || SnO32− ||
 * Stannite || SnO22− ||
 * Sulfate || SO42− ||
 * Sulfite || SO32− ||
 * Sulfonium || R3S+ ||
 * Superoxide || O2− ||
 * Tartrate || (CH(OH)COO)22− ||
 * Metatellurate || TeO42− ||
 * Orthotellurate || TeO66− ||
 * Tellurite || TeO32− ||
 * Thiocyanate || SCN− ||
 * Thiosulfate || S2O32− ||
 * Tosylate (toluenesulfonate) || CH3C6H4SO3− ||
 * Triflate (trifluoromethanesulfonate) || CF3SO3− ||
 * Tungstate || WO42− ||
 * Uranyl || UO2+ ||
 * Vanadate || VO3− ||
 * Vanadyl || VO2+ ||
 * Pervanadyl || VO2+ ||