Editing Polyatomic ion (section)

==Other examples of common polyatomic ions==
The following tables give additional examples of commonly encountered polyatomic ions. Only a few representatives are given, as the number of polyatomic ions encountered in practice is very large.

{|class="wikitable"
|+ [[Anion]]s
|-
| [[Tetrahydroxyborate]]
| {{chem2|B(OH)4-}}
|-
| [[Acetylide]]
| {{chem2|C2(2-)}}
|-
| [[Ethoxide]] or ethanolate
| {{chem2|C2H5O-}}
|-
| [[Acetate]] or ethanoate
| {{chem2|CH3COO-}} or {{chem2|C2H3O2-}}
|-
| [[Benzoate]]
| {{chem2|C6H5COO-}} or {{chem2|C7H5O2-}}
|-
| [[Citrate]]
| {{chem2|C6H5O7(3-)}}
|-
| [[Formate]]
| {{chem2|HCOO-}}
|-
| [[Carbonate]]
| {{chem2|CO3(2-)}}
|-
| [[Oxalate]]
| {{chem2|C2O4(2-)}}
|-
| [[Cyanide]]
| {{chem2|CN-}}
|-
| [[Chromate and dichromate|Chromate]]
| {{chem2|CrO4(2-)}}
|-
| [[Chromate and dichromate|Dichromate]]
| {{chem2|Cr2O7(2-)}}
|-
| [[Bicarbonate]] or hydrogencarbonate
| {{chem2|HCO3(-)}}
|-
| [[Phosphate#Chemical properties|Hydrogen phosphate]]
| {{chem2|HPO4(2-)}}
|-
| [[Phosphate#Chemical properties|Dihydrogen phosphate]]
| {{chem2|H2PO4(-)}}
|-
| [[Hydrogen sulfate]] or bisulfate
| {{chem2|HSO4(-)}}
|-
| [[Manganate]]
| {{chem2|MnO4(2-)}}
|-
| [[Permanganate]]
| {{chem2|MnO4(-)}}
|-
| [[Zincate]]
| {{chem2|ZnO2(2-)}}
|-
| [[Aluminate]]
| {{chem2|AlO2-}}
|-
| [[Tungstate]]
| {{chem2|WO4(2-)}}
|-
| [[Azanide]] or amide
| {{chem2|NH2(-)}}
|-
| [[Peroxide]]
| {{chem2|O2(2-)}}
|-
| [[Superoxide]]
| {{chem2|O2(-)}}
|-
| [[Hydroxide]]
| {{chem2|OH-}}
|-
| [[Bisulfide]]
| {{chem2|SH-}}
|-
| [[Cyanate]]
| {{chem2|OCN-}}
|-
| [[Thiocyanate]]
| {{chem2|SCN-}}
|-
| [[Orthosilicate]]
| {{chem2|SiO4(4-)}}
|-
| [[Thiosulfate]]
| {{chem2|S2O3(2-)}}
|-
| [[Azide]]
| {{chem2|N3(-)}}
|-
| [[Tetraperoxochromate]]
| {{chem2|Cr(O2)4(3-)}}
|}

{|class="wikitable"
|+ [[Cation]]s
|-
! colspan="2" | [[Onium ion]]s
! colspan="2" | [[Carbenium ion]]s
! colspan="2" | Others
|-
| [[Guanidine#Guanidinium cation|Guanidinium]]
| {{chem2|C(NH2)3+}}
| [[Tropylium cation|Tropylium]]
| {{chem2|C7H7+}}
| [[Mercury (element)#Compounds of mercury(I)|Mercury(I)]]
| {{chem2|Hg2(2+)}}
|-
| [[Ammonium]]
| {{chem2|NH4+}}
| [[Triphenylcarbenium]]
| {{chem2|(C6H5)3C+}}
| [[Dihydrogen cation|Dihydrogen]]
| {{chem2|H2+}}
|-
| [[Phosphonium]]
| {{chem2|PH4+}}
| [[Cyclopropenium ion|Cyclopropenium]]
| {{chem2|C3H3+}}
|
|
|-
| [[Hydronium]]
| {{chem2|H3O+}}
|[[Trifluoromethyl cation|Trifluoromethyl]] 
|{{chem2|CF3+}}
|
|
|-
| [[Fluoronium]]
| {{chem2|H2F+}}
|[[Triphenylguanidinium]]<ref>{{Cite journal |last=Silva |first=Pedro S. Pereira |last2=Gonçalves |first2=Mauro A. Pereira |last3=F. Campos |first3=Nuno M. |last4=Paixão |first4=José A. |last5=Silva |first5=Manuela Ramos |date=2025-04-03 |title=Charge density and quantum-chemical study of triphenylguanidine and triphenylguanidinium trifluoroacetate |url=https://link.springer.com/article/10.1007/s11224-025-02491-w |journal=Structural Chemistry |language=en |doi=10.1007/s11224-025-02491-w |issn=1572-9001|doi-access=free }}</ref>
|[(C<sub>6</sub>H<sub>5</sub>)NH]<sub>3</sub>C<sup>+</sup>
|
|
|-
| [[Pyrylium salt|Pyrylium]]
| {{chem2|C5H5O+}}
|
|
|
|
|-
| [[Sulfonium]]
| {{chem2|H3S+}}
|
|
|
|
|}