Common Inorganic Cations and Anions

aluminum

Al³+

ammonium

NH4 +

barium

Ba²+

cadmium

Cd²+

calcium

Ca²+

cesium

Cs+

chromium(III) or chromic

Cr³+

cobalt(II) or cobaltous

Co²+

copper(I) or cuprous

Cu+

copper(II) or cupric

Cu²+

hydrogen

H+

iron(II) or ferrous

Fe²+

iron(III) or ferric

Fe3+

lead(II) or plumbous

Pb²+

lithium

Li+

magnesium

Mg²+

manganese(II) or manganous

Mn²+

mercury(I) or mercurous

Hg2 2+

mercury(II) or mercuric

Hg²+

potassium

K+

rubidium

Rb+

silver

Ag+

sodium

Na+

strontium

Sr²+

tin(II) or stannous

Sn²+

zinc

Zn²+

bromide

Br-

carbonate

CO3 2-

chlorate

CIO3 -

chloride

Cl-

chromate

CrO4 2-

cyanide

CN-

dichromate

Cr₂O7 2-

dihydrogen phosphate

H₂PO₂ -

fluoride

F-

hydride

H-

hydrogen carbonate or bicarbonate

HCO3 -

hydrogen phosphate

HPO4 2-

hydrogen sulfate or bisulfate

HSO4 -

hydroxide

OH-

iodide

I-

nitrate

NO3 -

nitride

N 3-

nitrite

NO₂ -

oxide

0²-

permanganate

MnO4 -

peroxide

0₂²-

phosphate

PO4 3-

sulfate

SO4 2-

sulfide

S²-

sulfite

SO3 2-

thiocyanate

SCN-

acetate

C2H3O2 -

arsenate

AsO4³-

arsenite

AsO3 3-

azide

N3 -

benzoate

C7H5O2 -

borate

BO3 3-

bromate

BrO3 3-

chlorate

CIO3 -

chlorite

CIO₂ -

dihydrogen phosphate

H₂PO4 -

dihydrogen phosphite

H₂PO3 -

hydrogen phosphate

HPO4²-

hydrogen phosphite

HPO3 2-

thiosulfate

S₂O3 2-

iodate

IO3 -

manganate

MnO4 2-

oxalate

C₂O4 2-

perchlorate

CIO4 -

peroxide

0₂²-

phosphite

PO3 3-

silicate

SiO3 2-

tartrate

C4H4O3 2-

Hypochlorite

ClO -

Hydrogen sulfide

HS-

Hydrogen sulfite

HSO3 -