Common Cations. Monatomic Cations. All Group 1A metal cations: +1 charge [Li+
1, Na+1, K+1, Rb+1, Cs+1]. All Group 2A metal cations: +2 charge [Be+2, Mg+2 ...
Common Cations
Common Anions
Monatomic Cations
Monatomic Anions
All Group 1A metal cations: +1 charge [Li+1, Na+1, K+1, Rb+1, Cs+1]
All Group 7A non-metal anions: -1 charge [F-1, Cl-1, Br-1, I-1]
All Group 2A metal cations: +2 charge [Be+2, Mg+2, Ca+2, Sr+2, Ba+2]
All Group 6A non-metal anions: -2 charge [O-2, S-2, Se-2, Te-2]
The names of these Group 1A and 2A cations are the same as the original metal names.
All Group 5A non-metal anions: -3 charge [N-3, P-3, As-3]
Other common monatomic cations are listed in the table below. Note that if a metal can form more than one cation, the ion charge is included with the ion name as Roman Numerals in brackets. Al+3 Cd+2 Cr+2 Cr+3 Cr+6 Co+2 Co+3 Cu+1 Cu+2 Ga+3 Au+1 Au+3 In+1 In+3 Fe+2 Fe+3
Aluminum Cadmium Chromium(II) Chromium(III) Chromium(VI) Cobalt(II); Cobaltous Cobalt(III); Cobaltic Copper(I); Cuprous Copper(II); Cupric Gallium Gold(I); Aurous Gold(III); Auric Indium(I) Indium(III) Iron(II); Ferrous Iron(III); Ferric
Pb+2 Pb+4 Mn+2 Mn+3 Mn+4 Mn+7 Hg2+2 Hg+2 Ni+2 Ni+3 Ag+1 Sn+2 Sn+4 Ti+2 Ti+3 Ti+4 Zn+2
Lead(II); Plumbous Lead(IV); Plumbic Manganese(II) Manganese(III) Manganese(IV) Manganese(VII) Mercury(I); Mercurous Mercury(II); Mercuric Nickel(II); Nickelous Nickel(III); Nickelic rare Silver Tin(II); Stannous Tin(IV); Stannic Titanium(II) Titanium(III) Titanium(IV) Zinc
Polyatomic Cations There is only one common polyatomic cation: Ammonium, NH4+1.
All Group 4A non-metal anions: -4 charge [C-4] The names of these anions are based on the original non-metal names, but the endings are changed to –ide. Also note that hydrogen in ionic compounds is hydride, H-1 (behaves like a Group &A non-metal). Polyatomic Anions C2H3O2–1 AsO4–3 BO3–3 B4O7–2 BrO–1 BrO3–1 CO3–2 HCO3–1 ClO–1 ClO2–1 ClO3–1 ClO4–1 CrO4–2 Cr2O7–2 C6H5O7–3 CN–1 SCN–1
Acetate Arsenate Borate Tetraborate Hypobromite Bromate Carbonate Bicarbonate Hypochlorite Chlorite Chlorate Perchlorate Chromate Dichromate Citrate Cyanide Thiocyanate
OH–1 IO4–1 MoO4–2 NO2–1 NO3–1 C2O4–2 O2–2 MnO4–1 PO4–3 HPO4–2 H2PO4–1 SO3–2 SO4–2 HSO3–1 HSO4–1 S2O3–2
Hydroxide Periodate Molybdate Nitrite Nitrate Oxalate Peroxide Permanganate Phosphate Hydrogen phosphate Dihydrogen phosphate Sulfite Sulfate Bisulfite Bisulfate Thiosulfate
