Most Common Cations and Anions

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) or cuprous ion

Cu⁺

Cobalt(II) or 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

Hg²⁺

Nicklel(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

O²⁻

Peroxide ion

O₂²⁻

Sulfide ion

S²⁻

Nitride ion

N³⁻

Acetate ion

C₂H₃O₂⁻

Chlorate ion

ClO₃⁻

Perchlorate ion

ClO₄⁻

Nitrate ion

NO₃⁻

Permanganate ion

MnO₄⁻

Carbonate ion

CO₃²⁻

Chromate ion

CrO₄²⁻

Dichromate ion

Cr₂O₇²⁻

Sulfate ion

SO₄²⁻

Phosphate ion

PO₄³⁻

Sulfite ion

SO₃²⁻