polyatomic ions

ammonium

ammonium

NH4+

acetate

CH3COO-

borate

BO₃³⁻

carbonate

CO₃²⁻

chromate

CrO₄²⁻

chlorate

ClO3-

chlorite

ClO2-

cyanide

CN-

dichromate

Cr₂O₇²⁻

dihydrogen phosphate

H₂PO₄⁻

hydrogen carbonate

HCO3-

hydrogen phosphate

HPO₄²⁻

hydrogen sulfate

HSO4-

hydrogen sulfite

HSO3-

hypochlorite

ClO-

hydroxide

OH-

nitrate

NO3-

nitrite

NO2-

perchlorate

ClO4-

permanganate

MnO4-

peroxide

O₂²⁻

phosphate

PO₄³⁻

sulfate

SO₄²⁻

sulfite

SO₃²⁻

thiocyanate

SCN-

azide

N3-

disulfide

S22-

hydrochloric acid (strong)

HCl

hydrobromic acid (strong)

HBr

hydroiodic acid (strong)

HI

nitric acid (strong)

HNO3s

sulfuric acid (strong)

H2SO4

perchloric acid (strong)

HClO4

hydrofluoric acid

HF

acetic acid

CH3COOH

carbonic acid

H2CO3

hydrosulfuric acid

H2S

phosphoric acid

H3PO4