ION LIST Positive Ions (cations) Aluminum Ammonium Barium Calcium Chromium (III) Cobalt Copper (I) Copper (II) Hydrogen Iron (II) Iron (III) Lead (II) Lithium Magnesium Mercury (I) Mercury (II) Nickel Potassium Silver Sodium Strontium Tin (II) Zinc Al+3 Negative Ions (anions) Acetate C2H3O2-1 Ba +2 Bicarbonate HCO3-1 Ca +2 Bromide Br-1 +3 Carbonate CO3-2 +2 Chlorate ClO3-1 +1 Chloride Cl-1 +2 Chromate CrO4-2 Dichromate Cr2O7-2 Fe +2 Dihydrogen phosphate H2PO4-1 Fe +3 Fluoride F-1 +2 Hydrogen phosphate HPO4-2 +1 Hydrogen sulfate HSO4-1 +2 Hydroxide OH-1 +2 Iodide I-1 Nitrate NO3-1 Nitride N-3 Nitrite NO2-1 +1 Oxide O-2 +1 Permanganate MnO4-1 +2 Peroxide O2-2 +2 Phosphate PO4-3 +2 Sulfate SO4-2 Sulfide S-2 Sulfite SO3-2 Thiocyanate SCN-1 Thiosulfate S2O3-2 NH4 Cr +1 Co Cu Cu H +1 Pb Li Mg Hg2 +2 Hg +2 Ni K +1 Ag Na Sr Sn Zn