Common Cations Common Name Formula Historic Name Simple Cations Aluminium Al3+   Barium Ba2+   Beryllium Be2+   Caesium Cs+   Calcium Ca2+   Chromium(II) Cr2+ Chromous Chromium(III) Cr3+ Chromic Chromium(VI) Cr6+ Chromyl Cobalt(II) Co2+ Cobaltous Cobalt(III) Co3+ Cobaltic Copper(I) Cu+ Cuprous Copper(II) Cu2+ Cupric Copper(III) Cu3+   Gallium Ga3+   Helium He2+ (Alpha particle) Hydrogen H+ (Proton) Iron(II) Fe2+ Ferrous Iron(III) Fe3+ Ferric Lead(II) Pb2+ Plumbous Lead(IV) Pb4+ Plumbic Lithium Li+   Magnesium Mg2+   Manganese(II) Mn2+ Manganous Manganese(III) Mn3+ Manganic Manganese(IV) Mn4+ Manganyl Manganese(VII) Mn7+   Mercury(II) Hg2+ Mercuric Nickel(II) Ni2+ Nickelous Nickel(III) Ni3+ Nickelic Potassium K+   Silver Ag+   Sodium Na+   Strontium Sr2+   Tin(II) Sn2+ Stannous Tin(IV) Sn4+ Stannic Zinc Zn2+   Polyatomic Cations Ammonium NH4+   Hydronium H3O+   Nitronium NO2+   Uranyl UO22+   Mercury(I) Hg22+ Mercurous   HELPFUL STUFF!!

Common Anions Formal Name Formula Alt. Name Simple Anions Arsenide As3−   Azide N3−   Bromide Br−   Chloride Cl−   Fluoride F−   Hydride H−   Iodide I−   Nitride N3−   Oxide O2−   Phosphide P3−   Sulfide S2−   Peroxide O22−   Oxoanions Arsenate AsO43−   Arsenite AsO33−   Borate BO33−   Bromate BrO3−   Hypobromite BrO−   Carbonate CO32−   Hydrogen carbonate HCO3− Bicarbonate Hydroxide OH−   Chlorate ClO3−   Perchlorate ClO4−   Chlorite ClO2−   Hypochlorite ClO−   Chromate CrO42−   Dichromate Cr2O72−   Iodate IO3−   Nitrate NO3−   Nitrite NO2−   Phosphate PO43−   Hydrogen phosphate HPO42−   Dihydrogen phosphate H2PO4−   Permanganate MnO4−   Phosphite PO33−   Sulfate SO42−   Thiosulfate S2O32−   Hydrogen sulfate HSO4− Bisulfate Sulfite SO32−   Hydrogen sulfite HSO3− Bisulfite Anions from Organic Acids Acetate C2H3O2−   Formate HCO2−   Oxalate C2O42−   Hydrogen oxalate HC2O4− Bioxalate Other Anions Hydrogen sulfide HS− Bisulfide Telluride Te2−   Amide NH2−   Cyanate OCN−   Thiocyanate SCN−   Cyanide CN−