Acetate
CH3COO
Valency: -1
Amide
NH2
Valency: -1
Azide
N3
Valency: -1
Benzoate
C6H5COO
Valency: -1
Bromate
BrO3
Valency: -1
Chlorate
ClO3
Valency: -1
Chlorite
ClO2
Valency: -1
Cyanate
OCN
Valency: -1
cyanide
CN
Valency: -1
Dihydrogen phosphate
H2PO4
Valency: -1
Formate
HCOO
Valency: -1
Hydrogen carbonate
(aka bicarbonate)
HCO3
Valency: -1
Hydrogen sulfate
(bisulfate)
HSO4
Valency: -1
Hydrogen sulfide
(aka bisulfide or hydrosulfide)
HS
Valency: -1
Hydroxide
(called hydroxyl when aqueous)
OH
Valency: -1
Hypochlorite
ClO
Valency: -1
iodate
IO3
Valency: -1
nitrate
NO3
Valency: -1
Nitrite
NO2
Valency: -1
perchlorate
ClO4
Valency: -1
permanganate
MnO4
Valency: -1
thiocyanate
(aka thiocyanato)
SCN
Valency: -1
triiodide
I3
Valency: -1
vanadate
VO3
Valency: -1
Carbide
C2
Valency: -2
Carbonate
CO3
Valency: -2
Chromate
CrO4
Valency: -2
dichromate
Cr2O7
Valency: -2
Imide
NH
Valency: -2
manganate
MNO4
Valency: -2
matasilicate
SiO3
Valency: -2
monohydrogen phosphate
HPO4
Valency: -2
oxalate
C2O4
Valency: -2
peroxide
O2
Valency: -2
peroxydisulfate
S2O8
Valency: -2
phthalate
C8H4O4
Valency: -2
polysulfide
Sx (x number of S)
Valency: -2
selenate
SeO4
Valency: -2
sulfate
SO4
Valency: -2
sulfite
SO3
Valency: -2
tartrate
C4H4O6
Valency: -2
tellurate
TeO4
Valency: -2
tetraborate
B4O7
Valency: -2
thiosulfate
S2O3
Valency: -2
tungstate
WO4
Valency: -2
zincate
ZnO2
Valency: -2
aluminate
AlO3
Valency: -3
arsenate
AsO4
Valency: -3
borate
BO3
Valency: -3
citrate
C6H5O7
Valency: -3
phosphate
PO4
Valency: -3
orthosilicate
SiO4
Valency: -4
pyrophosphate
P2O7
Valency: -4
tripolyphosphate
P3O10
Valency: -5
Ammonium
NH4
Valency: +1
Hydronium
H3O
Valency: +1