Common ions

ammonium

NH₄⁺

copper(I) (green)

Cu⁺

hydronium

H₃O⁺

silver

Ag⁺

cadmium(II)

Cd²⁺

chromium(II)

Cr²⁺

copper(II) (blue)

Cu²⁺

cobalt(II) (blue)

Co²⁺

iron(II)

Fe²⁺

lead(II)

Pb²⁺

mercury(I)

Hg₂²⁺

mercury(II)

Hg²⁺

manganese(II)

Mn²⁺

nickel(II) (green)

Ni²⁺

tin(II)

Sn²⁺

vanadium(II)

V²⁺

zinc

Zn²⁺

cobalt(III) (blue)

Co³⁺

chromium(III)

Cr³⁺

iron(III)

Fe³⁺

lead(III)

Pb³⁺

nickel(III)

Ni³⁺

vanadium(III)

V³⁺

tin(IV)

Sn⁴⁺

lead(IV)

Pb⁴⁺

vanadium(IV)

V⁴⁺

manganese(VII)

Mn⁷⁺

acetate

CH₃COO⁻ or C₂H₃O₂⁻

hypobromite

BrO⁻

bromite

BrO₂⁻

bromate

BrO₃⁻

perbromate

BrO₄⁻

hypochlorite

ClO⁻

chlorite

ClO₂⁻

chlorate

ClO₃⁻

perchlorate

ClO₄⁻

cyanide

CN⁻

dihydrogen phosphate

H₂PO₄⁻

formate

HCOO⁻

hydrogen carbonate (bicarbonate)

HCO₃⁻

hydrogen sulfite (bisulfite)

HSO₃⁻

hydrogen sulfate (bisulfate)

HSO₄⁻

bisulfide

HS⁻

hydroxide

OH⁻

nitrite

NO₂⁻

nitrate

NO₃⁻

hypoiodite

IO⁻

iodite

IO₂⁻

iodate

IO₃⁻

periodate

IO₄⁻

permanganate (purple)

MnO₄⁻

thiocyanate

SCN⁻

carbonate

CO₃²⁻

chromate (yellow)

CrO₄²⁻

dichromate (orange)

Cr₂O₇²⁻

hydrogen phosphate

HPO₄²⁻

oxalate

C₂O₄²⁻

peroxide

O₂²⁻

sulfite

SO₃²⁻

sulfate

SO₄²⁻

thiosulfate

S₂O₃²⁻

phosphite

PO₃³⁻

phosphate

PO₄³⁻

arsenate

AsO₄³⁻