+1

+2

NH₄⁺ Ammonium

Hg₂²⁺ Mercury (I) or Mercurous

-1

-2

-3

-4

C₂H₃O₂^- Acetate

CO₃^2- Carbonate

AsO₄^3- Arsenate

Fe(CN)₆^4- Hexacyanoferrate (II) or Ferrocyanide

AlO₂^- Aluminate

CrO₄^2- Chromate

AsO₃^3- Arsenite

HCO₃^- Bicarbonate, Hydrogen Carbonate

Cr₂O₇^2- Dichromate

Fe(CN)₆^3- Hexacyanoferrate (III) or Ferricyanide

BrO₃^- Bromate

C₂O₄^2- Oxalate

PO₄^3- Phosphate

ClO₄^- Perchlorate

O₂^2- Peroxide

PO₃^3- Phosphite

ClO₃^- Chlorate

SiO₃^2-Silicate

ClO₂^- Chlorite

SO₄^2- Sulfate

ClO^- Hypochlorite

SO₃^2- Sulfite

CrO₂^- Chromite

C₄H₄O₆^2- Tartrate

CN^- Cyanide

S₂O₃^2- Thiosulfate

OH^- Hydroxide

MoO₄^2-Molybdate

IO₃^- Iodate.

NO₃^- Nitrate

NO₂^- Nitrite

MnO₄^- Permanganate