ammonium

NH₄ ⁺

zinc

Zn ²⁺

chromium(II)

Cr ²⁺

Bicarbonate/hydrogen carbonate

HCO₃ ⁻

chromium(III)

Cr ³⁺

carbonate

CO₃ ²⁻

cobalt

Co ²⁺

chlorate

ClO₃ ⁻

copper(I)

Cu ⁺

chromate

CrO₄ ²⁻

copper(II)

Cu ²⁺

dichromate

Cr₂O₇ ²⁻

iron(II)

Fe ²⁺

hydride

H⁻

iron(III)

Fe ³⁺

hydroxide

OH ⁻

lead(II)

Pb ²⁺

hydronium

H₃O⁺

manganese(II)

Mn ²⁺

nitrate

NO₃ ⁻

mercury(II)

Hg ²⁺

nitrite

NO₂ ⁻

nickel

Ni ²⁺

permanganate

MnO₄ ⁻

silver

Ag ⁺

phosphate

PO₄ ³⁻

tin(II)

Sn ²⁺

sulfate

SO₄ ²⁻

tin(IV)

Sn ⁴⁺

sulfite

SO₃ ²⁻

BrO₄^1-

Perbromate ion

BrO₃^1-

Bromate ion

BrO₂^1-

Bromite ion

BrO^1-

Hypobromite ion

CO₄^2-

CO₃^2-

Carbonate ion

CO₂^2-

CO^2-

ClO₄^1-

ClO₃^1-

Chlorate ion

ClO₂^1-

ClO^1-

IO₄^1-

IO₃^1-

Iodate ion

IO₂^1-

IO^1-

NO₄^1-

NO₃^1-

Nitrate ion

NO₂^1-

NO^1-

PO₅^3-

PO₄^3-

Phosphate ion

PO₃^3-

PO₂^3-

SO₅^2-

SO₄^2-

Sulfate ion

SO₃^2-

SO₂^2-

1 more oxygen

“normal”

1 less oxygen

2 less oxygen