Polyatomic ions

Cyanide

CN-

Carbonate

CO₃^2-

hydrogen carbonate / bicarbonate

HCO₃^-

acetate

C₂H₃O₂^-

oxalate

C₂O₄^2-

hypochlorite

ClO^-

chlorite

ClO₂^-

chlorate

ClO₃^-

perchlorate

ClO₄^-

chromate

CrO₄^2-

dichromate

Cr₂O₇^2-

permanganate

MnO₄^-

manganate : MnO₄^2-

thiosulfate

S₂O₃^2-

nitrite

NO₂^-

nitrate

NO₃^-

hydroxide

OH^-

peroxide

O₂^2-

phosphate

PO₄^3-

hydrogen phosphate

HPO₄^2-

dihydrogen phosphate

H₂PO₄^-

sulfite

SO₃^2-

sulphate

SO₄^2-

hydrogen sulfite / bisulfite

HSO₃^-

hydrogen sulphate / bisulphate

HSO₄^-

glucose

C₆H₁₂O₆

ammonium

NH₄⁺

ammonia

NH₃

Mercury (I)

Hg²⁺

bisulfite

HSO₃^-

bisulfate

HSO₄^-

hydrogen

H2

oxygen

O2

fluorine

F2

iodine

I2

nitrogen

N2

chlorine

Cl2

bromine

Br2

Phosphorus

P4

Sulfur

S8

Hydronium

H₃O⁺

acetic

H₂C₂H₃O₂

carbonic

H₂CO₃

nitric

HNO₃

perchloric

HClO₄

phosphoric

H₃PO₄

sulphuric

H₂SO₄

hydrochloric

HCl

hydrobromic

HBr

hydroiodic

HI

hydrosulphuric

H₂S

nitrous

HNO₂

sulphuric acid

H₂SO₄