Common Cations and Anions

H+

Hydrogen ion

Zn2+

Zinc ion

Co2+

Cobalt(II) or cobaltous ion

Li+

Lithium ion

NH4+

Ammonium ion

Cu+

Copper(I) or cuprous ion

Na+

Sodium ion

K+

Potassium ion

Cs+

Cesium ion

Ag+

Silver ion

Mg2+

Magnesium ion

Ca2+

Calcium ion

Sr2+

Strontium ion

Ba2+

Barium ion

Cu2+

Copper(II) or cupric ion

Fe2+

Iron(II) or ferrous ion

Mn2+

Manganese(II) or manganous ion

Cd2+

Cadmium ion

Hg22+

Mercury(I) or mercurous ion

Hg2+

Mercury(II) or mercuric ion

Ni2+

Nickel(II) or nickelous ion

Pb2+

Lead(II) or plumbous ion

Sn2+

Tin(II) or stannous ion

Al3+

Aluminum ion

Cr3+

Chromium(III) or chromic ion

Fe3+

Iron(III) or ferric ion

H-

Hydride ion

F-

Fluoride ion

CH3COO- (or C2H3O2-)

Acetate ion

ClO3-

Chlorate ion

Cl-

Chloride ion

ClO4-

Perchlorate ion

Br-

Bromide ion

NO3-

Nitrate ion

I-

Iodide ion

MnO4-

Permanganate ion

CN-

Cyanide ion

OH-

Hydroxide ion

O2-

Oxide ion

CO32-

Carbonate ion

F-

Fluoride ion

O22-

Peroxide ion

CrO42-

Chromate ion

S2-

Sulfide ion

Cr2O72-

Dichromate ion

SO42-

Sulfate ion

N3-

Nitride ion

PO43-

Phosphate ion