2.4 CHAPTER 2. CLASSIFICATION OF MATTER
Compound ion Formula Compound ion Formula Compound ion Formula
Hydrogen H+ Lithium Li+ Sodium Na+
Potassium K+ Silver Ag+ Mercury (I) Hg+
Copper (I) Cu+ Ammonium NH+ 4 Beryllium Be2+
Magnesium Mg2+ Calcium Ca2+ Barium Ba2+
Tin (II) Sn2+ Lead (II) Pb2+ Chromium (II) Cr2+
Manganese (II) Mn2+ Iron (II) Fe2+ Cobalt (II) Co2+
Nickel Ni2+ Copper (II) Cu2+ Zinc Zn2+
Aluminium Al3+ Chromium (III) Cr3+ Iron (III) Fe3+
Cobalt (III) Co3+ Chromium (VI) Cr6+ Manganese (VII) Mn7+Table 2.3: Table of cationsCompound ion Formula Compound ion Formula
Fluoride F− Oxide O^2 −
Chloride Cl− Peroxide O^22 −
Bromide Br− Carbonate CO^23 −
Iodide I− Sulphide S^2 −
Hydroxide OH− Sulphite SO^23 −
Nitrite NO− 2 Sulphate SO^24 −
Nitrate NO− 3 Thiosulphate S 2 O^23 −
Hydrogen carbonate HCO− 3 Chromate CrO^24 −
Hydrogen sulphite HSO− 3 Dichromate Cr 2 O^27 −
Hydrogen sulphate HSO− 4 Manganate MnO^24 −
Dihydrogen phosphate H 2 PO− 4 Oxalate (COO)^22 −/C 2 O^24 −
Hypochlorite ClO− Hydrogen phosphate HPO^24 −
Chlorate ClO− 3 Nitride N^3 −
Permanganate MnO− 4 Phosphate PO^34 −
Acetate (ethanoate) CH 3 COO− Phosphide P^3 −Table 2.4: Table of anions5 .Prefixescan be used to describe the ratio of the elements that are in the compound.36 Chemistry: Matter and Materials