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This is a '''list of polyatomic ions'''. This list is incomplete, you may help by expanding it.


{|class="wikitable" 

! colspan="2" | [[Anion]]s 

|-

| [[Arsenate]]

| {{chem|AsO|4|3-}}

|-

| [[Hypobromite]]

| {{chem|BrO|-}}

|-

| Bromite

| {{chem|BrO|2|-}}

|-

| [[Bromate]]

| {{chem|BrO|3|-}}

|-

| [[Perbromate]]

| {{chem|BrO|4|-}}

|-

| [[Acetate]] (ethanoate)

| {{chem|CH|3|COO|-}} or {{chem|C|2|H|3|O|2|-}}

|-

| [[Acetylide]]

| {{chem|C|2|2-}}

|-

| [[Benzoate]]

| {{chem|C|6|H|5|COO|-}} or {{chem|C|7|H|5|O|2|-}}

|-

| [[Carbonate]]

| {{chem|CO|3|2-}}

|-

| [[Oxalate]]

| {{chem|C|2|O|4|2-}}

|-

| [[Chromate and dichromate|Chromate]]

| {{chem|Cr|O|4|2-}}

|-

| [[Tartrate]]

| {{chem|C|4|H|4|O|6|2-}}

|-

| [[Citrate]]

| {{chem|C|6|H|5|O|7|3-}}

|-

| [[Cyanide]]

| {{chem|CN|-}}

|-

| [[Cyanate]]

| {{chem|CNO|-}}

|-

| [[Fulminate]] (methanoate)

| {{chem|CNO|-}}

|-

| [[Hypochlorite]]

| {{chem|ClO|-}}

|-

| [[Chlorite]]

| {{chem|ClO|2|-}}

|-

| [[Chlorate]]

| {{chem|ClO|3|-}}

|-

| [[Perchlorate]]

| {{chem|ClO|4|-}}

|-

| [[Chromate and dichromate|Dichromate]]

| {{chem|Cr|2|O|7|2-}}

|-

| [[Ferricyanide]]

| [Fe(CN)<sub>6</sub>]<sup>3−</sup>. 

|-

| [[Ferrocyanide]]

| [Fe(CN)<sub>6</sub>]<sup>4−</sup>. 

|-

| [[Dihydrogen phosphate]]

| {{chem|H|2|PO|4|-}}

|-

| [[Bicarbonate|Hydrogen carbonate]] (bicarbonate)

| {{chem|HCO|3|-}}

|-

| [[Formate]]

| {{chem|HCO|2|-}}

|-

| [[Bisulfate|Hydrogen sulfate]] (bisulfate)

| {{chem|HSO|4|-}}

|-

| [[Phosphate#Chemical properties|Hydrogen phosphate]]

| {{chem|HPO|4|2-}}

|-

| Hypoiodite

| {{chem|IO|-}}

|-

| [[Iodite]]

| {{chem|IO|2|-}}

|-

| [[Iodate]]

| {{chem|IO|3|-}}

|-

| [[Periodate]]

| {{chem|IO|4|-}}

|-

| [[Hydroxide]]

| {{chem|OH|-}}

|-

| [[Azide]]

| {{chem|N|3|-}}

|-

| [[Nitrite]]

| {{chem|NO|2|-}}

|-

| [[Nitrate]]

| {{chem|NO|3|-}}

|-

| [[Peroxide]]

| {{chem|O|2|2-}}

|-

| [[Manganate]]

| {{chem|MnO|4|2-}}

|-

| [[Permanganate]]

| {{chem|MnO|4|-}}

|-

| [[Hexafluorophosphate]]

| {{chem|PF|4|-}}

|-

| [[Phosphite  anion|Phosphite]]

| {{chem|PO|3|3-}}

|-

| [[Phosphate]]

| {{chem|PO|4|3-}}

|-

| [[Thiocyanate]]

| {{chem|SCN|-}}

|-

| [[Metasilicate]]

| {{chem|SiO|3|2-}}

|-

| [[Silicate]]

| {{chem|SiO|4|2-}}

|-

| [[Sulfite]]

| {{chem|SO|3|2-}}

|-

| [[Sulfate]]

| {{chem|SO|4|2-}}

|-

| [[Thiosulfate]]

| {{chem|S|2|O|3|2-}}

|-

| [[Pyrosulfate]] (disulfate)

| {{chem|S|2|O|7|2-}}

|-

| [[Tetrathionate]]

| {{chem|S|4|O|6|2-}}

|-

| [[Selenate]]

| {{chem|SeO|4|2-}}

|}


{|class="wikitable" 

! colspan="2" | [[Cation]]s 

|-

| [[Ammonium]]

| {{chem|NH|4|+}}

|-

| [[Nitronium]]

| {{chem|NO|2|+}}

|-

| [[Phosphonium]]

| {{chem|PH|4|+}}

|-

| [[Hydronium]]

| {{chem|H|3|O|+}}

|-

| [[Fluoronium]]

| {{chem|H|2|F|+}}

|-

| [[Mercury (element)|Mercury(I)]]

| {{chem|Hg|2|2+}}

|-

| [[Tropylium cation|Tropylium]]

| {{chem|C|7|H|7|+}}

|-

| [[Guanidine#Guanidinium cation|Guanidinium]]

| {{chem|C|(NH|2|)|3|+}}

|}


== References ==

http://scientifictutor.org/wp-content/uploads/2015/07/Polyatomic-Ions-Final.jpg

https://www.pinterest.com/pin/258182991113891454

https://web.archive.org/web/20121227231645/http://www2.pvc.maricopa.edu/tutor/chem/chem130/nomenclature/polyatomicion.html List of polyatomic ions

http://www.chemistry.wustl.edu/~edudev/LabTutorials/PeriodicProperties/Ions/ions.html Tables of Common Polyatomic Ions], including [[Protein Data Bank|PDB]] files

https://pubchem.ncbi.nlm.nih.gov/




[[Category:Ions]]

[[Category:Lists of chemical elements]]

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