Common Ions

Ions w/more than 1 element are polyatomic ions Memorize the 5 bold, negative ions

Cations (+ ions) Anions (- ions)

Name Formula Name Formula

Aluminum Al³⁺ Acetate C₂H₃O₂^- (CH₃COO^-)

Ammonium NH₄⁺ Bicarbonate HCO₃^-

Chromium Bisulfate HSO₄^-

Chromium (II) [Chromous]
Cr²⁺ Bisulfide HS^-

Chromium (III) [Chromic]
Cr³⁺ Bisulfite HSO₃^-

Copper Carbonate CO₃^2-

Copper (I) [Cuprous]
Cu⁺ Chlorate ClO₃^-

Copper (II) [Cupric]
Cu²⁺ Chromate CrO₄^2-

Hydrogen H⁺ Dichromate Cr₂O₇^2-

Iron Ferricyanide Fe(CN)₆^3-

Iron (II) [Ferrous]
Fe²⁺ Hydroxide OH^-

Iron (III) [Ferric]
Fe³⁺ Hypochlorite ClO^-

Lead Nitrate NO₃^-

Lead (II)
Pb²⁺ Nitrite NO₂^-

Lead (IV)
Pb⁴⁺ Perchlorate ClO₄^-

Mercury Permanganate MnO₄^-

Mercury (I) [Mercurous]
Hg₂²⁺ Phosphate PO₄^3-

Mercury (II) [Mercuric]
Hg²⁺ Sulfate SO₄^2-

Silver Ag⁺ Sulfite SO₃^2-

Tin Thiocyanate SCN^-

Tin (II) [Stannous]
Sn²⁺

Tin (IV) [Stannic]
Sn⁴⁺

Zinc Zn²⁺