Polyatomic Ions

Sulfite

SO3^2-

Nitrate

NO3^-

Nitrite

NO2^-

Ammonium

NH4^+

Mercury (I)

Hg2^2+

Cyanide

CN^-

Phosphate

PO4^3-

Hydroxide

OH^-

Bisulfate

HSO4^-

Sulfate

SO4^2-

Bicarbonate

HCO3^-

Carbonate

CO3^2-

Thiocyanate

SCN^-

Dihydrogen Phosphate

H2PO4^-

Hydrogen Phosphate

HPO4^2-

Acetate

C2H3O2^-

Perchlorate

ClO4^-

Chlorate

ClO3^-

Chlorite

ClO2^-

Hypochlorite

ClO^-

Chromium

Cr, a transition metal with multiple oxidation states.

Oxalate

C2O4^2-

Peroxide

O2^2-

Chromate

CrO4^2-

Permanganate

MnO4^-

Mercury

Hg, a transition metal with multiple oxidation states.

Copper

Cu, a transition metal with oxidation states of +1 or +2.

Cobalt

Co, a transition metal with oxidation states of +2 or +3.

Iron

Fe, a transition metal with oxidation states of +2 or +3.

Manganese

Mn, a transition metal with oxidation states of +2, +3, +4, +6, or +7.

Arsenate

AsO4^3-

Arsenite

AsO3^3-

Dichromate

Cr2O7^2-

Lead

Pb, a metal with oxidation states of +2 or +4.

Tin

Sn, a metal with oxidation states of +2 or +4.

Azide

N3^-

Disulfide

S2^2-

Silicate

SiO3^2-

Thiosulfate

S2O3^2-

Hydronium

H3O^+

Bromate

BrO3^-

Antimony

Sb, a metalloid with oxidation states of +3 or +5.

Bismuth

Bi, a metal with oxidation states of +3 or +5.

Gold

Au, a precious metal with oxidation states of +1 or +3.