Table 1: Cations (+1 Charge)

Ion	Two-Dimensional Structure	Three-Dimensional Representation
Ammonium NH4+
Hydronium H3O+

Table 2: Anions (-1 Charge)

Ion	Two-Dimensional Structure	Three-Dimensional Representation
Bicarbonate HCO3-
Cyanide CN-
Hydrogen Sulfate HSO4-
Hydroxide OH-
Nitrate NO3-
Nitrite NO2-
Perchlorate ClO4-
Permanganate MnO4-

Table 3: Anions (-2 Charge)

Ion	Two-Dimensional Structure	Three-Dimensional Representation
Carbonate CO32-
Chromate CrO42-
Dichromate Cr2O72-
Hydrogen Phosphate HPO42-
Sulfate SO42-
Sulfite SO32-
Thiosulfate S2O32-

Table 4: Anions (-3 Charge)

Ion	Two-Dimensional Structure	Three-Dimensional Representation
Phosphate PO43-

http://www.chemistry.wustl.edu/~edudev/LabTutorials/PeriodicProperties/Ions/ions.html