Formulas and Names of Common Cations and Anions
Ba²⁺
barium ion
Br⁻
bromide ion
Ca²⁺
calcium ion
C₂²⁻
carbide ion
CO₃²⁻
carbonate ion
Cs⁺
cesium ion
ClO₃⁻
chlorate ion (BrO₃⁻ = bromate ion, IO₃⁻ = iodate ion)
Cl⁻
chloride ion
ClO₂⁻
chlorite ion (BrO₂⁻ = bromite ion, IO₂⁻ = iodite ion)
CrO₄²⁻
chromate ion
Cr³⁺
chromium(III) ion
Co²⁺
cobalt(II) ion
Co³⁺
cobalt(III) ion
Cu⁺
copper(I) ion
Cu²⁺
copper(II) ion
NCO⁻
cyanate ion
CN⁻
cyanide ion
Cr₂O₇²⁻
dichromate ion
H₂PO₄⁻
dihydrogen phosphate ion
F⁻
fluoride ion
HCO₂⁻
formate ion
Au⁺
gold(I) ion
Au³⁺
gold(III) ion
H⁻
hydride ion
HCO₃⁻
hydrogen carbonate ion
H⁺
hydrogen ion
HC₂O₄⁻
hydrogen oxalate ion
HPO₄²⁻
hydrogen phosphate ion
HSO₄⁻
hydrogen sulfate ion
H₃O⁺
hydronium ion
OH⁻
hydroxide ion
ClO⁻
hypochlorite ion (BrO⁻ = hypobromite ion, IO⁻ = hypoiodite ion)
I⁻
iodide ion
Fe²⁺
iron(II) ion
Fe³⁺
iron(III) ion
Pb²⁺
lead(II) ion
Li⁺
lithium ion
Mg²⁺
magnesium ion
Mn²⁺
manganese(II) ion
Mn³⁺
manganese(III) ion
Hg₂²⁺
mercury(I) ion
Hg²⁺
mercury(II) ion
Ni²⁺
nickel(II) ion
NO₃⁻
nitrate ion
N³⁻
nitride ion
NO₂⁻
nitrite ion
C₂O₄²⁻
oxalate ion
O²⁻
oxide ion
ClO₄⁻
perchlorate ion (BrO₄⁻ = perbromate ion, IO₄⁻ = periodate ion)
MnO₄⁻
permanganate ion
O₂²⁻
peroxide ion
PO₄³⁻
phosphate ion
P³⁻
phosphide ion
PO₃³⁻
phosphite ion
K⁺
potassium ion
Rb⁺
rubidium ion
Sc³⁺
scandium(III) ion
SeO₄²⁻
selenate ion
Se²⁻
selenide ion
SeO₃²⁻
selenite ion
Ag⁺
silver(I) ion
Na⁺
sodium ion
Sr²⁺
strontium ion
SO₄²⁻
sulfate ion
S²⁻
sulfide ion
SO₃²⁻
sulfite ion
Te²⁻
telluride ion
Tl⁺
thallium(I) ion
NCS⁻
thiocyanate ion
Sn²⁺
tin(II) ion
Sn⁴⁺
tin(IV) ion
Ti³⁺
titanium(III) ion
Zn²⁺
zinc(II) ion
C₂H₃O₂⁻
acetate ion
Al³⁺
aluminum ion
NH₄⁺
ammonium ion
AsO₄³⁻
arsenate ion
As³⁻
arsenide ion
N₃⁻
azide ion
