Ammonium Ion
NH 4
Charge: +
hydroxide ion
OH
Charge: -
Nitrite ion
NO 2
Charge: -
Nitrate ion
NO 3
Charge: -
Chlorite Ion
ClO 2
Charge: -
Chlorate ion
ClO 3
Charge: -
Phosphate ion
PO 4
Charge: 3 -
Carbonate ion
CO 3
Charge: 2-
Hydronium ion
H 3O
Charge: +
Sulfite ion
SO 3
Charge: 2-
Sulfate ion
SO 4
Charge: 2-
Chromate ion
CrO 4
Charge: 2-
Dichromate ion
Cr 2O 7
Charge: 2-
Iodate ion
IO 3
Charge: 1-
Bromate ion
BrO 3
Charge: -
Perbromate ion
BrO4
Charge: -1
Hypobromite ion
BrO
Charge: -
Acetate ion
CH3COOH
Charge: -
Cyanide ion
CN
Charge: -
Arsenate
AsO4
Charge: 3-
Per(name)ate ion
One more oxygen than normal
Name(ate) ion
Normal oxygen
Name(ite) ion
One less oxygen
Hypo(name)ite ion
Two less oxygen