Polyatomic Ions and Metals with Multiple Ion States

Common Polyatomic Ions

• Acetate
    - Formula: $C_2H_3O_2$
    - Charge: -1

• Ammonium
    - Formula: $NH_4$
    - Charge: +1

• Bicarbonate
    - Formula: $HCO_3$
    - Charge: -1

• Bromate
    - Formula: $BrO_3$
    - Charge: -1

• Carbonate
    - Formula: $CO_3$
    - Charge: -2

• Carbonite
    - Formula: $CO_2$
    - Charge: -2

• Chlorate
    - Formula: $ClO_3$
    - Charge: -1

• Chlorite
    - Formula: $ClO_2$
    - Charge: -1

• Chromate
    - Formula: $CrO_4$
    - Charge: -2

• Hydrogen Phosphate
    - Formula: $HPO_4$
    - Charge: -2

• Hydrogen Sulfate
    - Formula: $HSO_4$
    - Charge: -1

• Hydrogen Sulfide
    - Formula: $HS$
    - Charge: -1

• Hydrogen Sulfite
    - Formula: $HSO_3$
    - Charge: -1

• Hydronium
    - Formula: $H_3O$
    - Charge: +1

• Hydroxide
    - Formula: $OH$
    - Charge: -1

• Nitrate
    - Formula: $NO_3$
    - Charge: -1

• Nitrite
    - Formula: $NO_2$
    - Charge: -1

• Permanganate
    - Formula: $MnO_4$
    - Charge: -1

• Phosphate
    - Formula: $PO_4$
    - Charge: -3

• Phosphite
    - Formula: $PO_3$
    - Charge: -3

• Sulfate
    - Formula: $SO_4$
    - Charge: -2

• Sulfite
    - Formula: $SO_3$
    - Charge: -2

Metals with Multiple Ion States

• Chromium (Cr)
    - Ion States: +2, +3

• Manganese (Mn)
    - Ion States: +2, +3

• Iron (Fe)
    - Ion States: +2, +3

• Cobalt (Co)
    - Ion States: +2, +3

• Nickel (Ni)
    - Ion States: +2, +3

• Copper (Cu)
    - Ion States: +1, +2

• Lead (Pb)
    - Ion States: +2, +4

• Tin (Sn)
    - Ion States: +2, +4