This document lists common chemical symbols and names for ions and ionic compounds. It provides the symbols and two common name formats for many monoatomic, polyatomic, and transition metal ions. Examples include Ag+ for the silver ion, also called the silver(I) or aurous ion, and HPO42- for the hydrogen phosphate ion. In total, over 50 different ions and ionic compounds are defined in the table.

1. Symbols Names
Ag+ silver ion Hg2+ mercury(II) / mercuric
Al3+ aluminum ion HPO42- hydrogen phosphate
As3- arsenide HS- hydrogen sulfide
AsO43- arsenate HSO3- hydrogen sulfite (bisulfite)
Au+ gold(I) / aurous HSO4- hydrogen sulfate (bisulfate)
Au3+ gold(III) / auric I- Iodide
Ba2+ barium ion IO3- Iodate
Be2+ beryllium ion IO4- Periodate
BO33- Borate IO- Hypoiodite
Br- Bromide Mn2+ manganese(II) /
BrO3- Bromate manganous
BrO- Hypobromite Mn3+ manganese(III) / manganic
CH3COO- Acetate MnO4- Permanganate
C2O42- Oxalate N3- Nitride
Ca2+ calcium ion NH2- Amide
Cl- Chloride NH4+ ammonium ion
ClO2- Chlorite Ni2+ nickel ion
ClO3- Chlorate NO2- Nitrite
ClO4- Perchlorate NO3- Nitrate
ClO- Hypochlorite O22- Peroxide
CN- Cyanide O2- Oxide
CO32- Carbonate OH- Hydroxide
Co2+ cobalt(II) / cobaltous P3- Phosphide
Co3+ cobalt(III) / cobaltic Pb2+ lead(II) / plumbous
Cr2O72- Dichromate Pb4+ lead(IV) / plumbic
Cr2+ chromium(II) / chromous PO33- Phosphite
Cr3+ chromium(III) / chromic PO43- Phosphate
CrO42- Chromate S2O32- Thiosulfate
Cu+ copper(I) / cuprous S2- Sulfide
Cu2+ copper(II) / cupric SCN- Thiocyanate
F- Fluoride Se2- Selenide
Fe2+ iron(II) / ferrous SeO42- Selenate
Fe3+ iron(III) / ferric SiF62- Hexafluorosilicate
H2PO4- dihydrogen phosphate SiO32- Silicate
H+ hydrogen ion Sn2+ tin(II) / stannous
H- Hydride Sn4+ tin(IV) / stannic
HC2O4- hydrogen oxalate SO32- sulfite
(binoxalate) SO42- sulfate
Te2- telluride
HCO3- hydrogen carbonate Zn2+ zinc ion
(bicarbonate)
Hg22+ mercury(I) / mercurous