Common Ions

hydrogen ion

H⁺

lithium ion

Li⁺

sodium ion

Na⁺

potassium ion

K⁺

cesium ion

Cs⁺

silver ion

Ag⁺

magnesium ion

Mg²⁺

calcium ion

Ca²⁺

strontium ion

Sr²⁺

barium ion

Ba²⁺

zinc ion

Zn²⁺

cadmium ion

Cd²⁺

aluminum ion

Al³⁺

ammonium ion

NH₄⁺

copper(I) oe cuprous ion

Cu⁺

cobalt (II) oe cobaltous ion

Co²⁺

copper (II) or cupric ion

Cu²⁺

iron (II) or ferrous ion

Fe²⁺

manganese (II) or manganous ion

Mn²⁺

mercury (I) or mercurous ion

Hg₂²⁺

mercury (II) or mercuric ion

Hg₂²⁺

nickel (II) or nickelous ion

Ni²⁺

lead (II) or plumbous ion

Pb²⁺

tin (II) or stannous ion

Sn²⁺

chromium (III) or chromic ion

Cr³⁺

iron (III) or ferric ion

Fe³⁺

hydride ion

H^-

fluoride ion

F^-

chloride ion

Cl^-

bromide ion

Br^-

iodide ion

I^-

cyanide ion

CN^-

hydroxide ion

OH^-

oxide ion

O^2-

peroxide ion

O₂^2-

sulfide ion

S^2-

nitride ion

N^3-

acetate ion

CH₃COO^-/C₂H₃O₂^-

chlorate ion

ClO₃^-

perchlorate ion

ClO₄^-

nitrate ion

NO₃^-

permanganate ion

MnO₄^-

carbonate ion

CO₃^2-

chromate ion

CrO₄^2-

dichromate ion

Cr₂O₇^2-

sulfate ion

SO₄^2-

phosphate ion

PO₄^3-