polyatomic ions

NH4+

ammonium, +1

H3O +

hydronium, +1

Hg2^2+

mercury (I), +1

H2PO3-

dihydrogen phosphite, -1

H2PO4-

dihydrogen phosphate, -1

HCO3-

hydrogen carbonate, -1

HSO4-

hydrogen sulfate, -1

HSO3-

hydrogen sulfite, -1

NO2-

nitrite, -1

NO3-

nitrate, -1

OH-

hydroxide, -1

CH3COO-

acetate, -1

CrO2-

chromite, -1

CN-

cyanide, -1

CNO-

cyanate, -1

CNS-

thiocyanate, -1

MNO4-

permanganate, -1

ClO-

hypochlorite, -1

ClO2-

chlorite, -1

ClO3-

chlorate, -1

ClO4-

perchlorate, -1

BrO-

hypobromite, -1

BrO2-

bromite, -1

BrO3-

bromate, -1

BrO4-

perbromate, -1

IO-

hypoiodite, -1

IO2-

iodite, -1

IO3-

iodate, -1

IO4-

periodate, -1

N3-

azide, -1

HPO3 2-

hydrogen phosphite, -2

HPO4 2-

hydrogen phosphate, -2

CO3 2-

carbonate, -2

SO3 2-

sulfite, -2

SO4 2-

sulfate, -2

S2O3 2-

thiosulfate, -2

C2O4 2-

oxalate, -2

CrO4 2-

chromate, -2

Cr2O7 2-

dichromate, -2

O2 2-

peroxide, -2

S2 2-

disulfide, -2

O 2-

oxide, -2

S 2-

sulfide, -2

PO4 3-

phosphate, -3

AsO3 3-

arsenite, -3

AsO4 3-

arsenate, -3

N 3-

nitride, -3

SiO3 2-

silicate, -2

O2 1-

Superoxide -

MoO4 2-

molybdate, -2