Common Polyatomic Ions and Transition Metal Ions

Vocabulary practice cards featuring names and formulas for common polyatomic anions, transition metal ions with fixed oxidation states, and cationic ions to memorize.

Carbonate

Polyatomic ion with the chemical formula $CO_3^{2-}$

Carbonite

Polyatomic ion with the chemical formula $CO_2^{2-}$

Sulfate

Polyatomic ion with the chemical formula $SO_4^{2-}$

Sulfite

Polyatomic ion with the chemical formula $SO_3^{2-}$

Thiosulfate

Polyatomic ion with the chemical formula $S_2O_3^{2-}$

Nitrate

Polyatomic ion with the chemical formula $NO_3^{-}$ ($NO_3^{1-}$)

Nitrite

Polyatomic ion with the chemical formula $NO_2^{-}$ ($NO_2^{1-}$)

Phosphate

Polyatomic ion with the chemical formula $PO_4^{3-}$

Phosphite

Polyatomic ion with the chemical formula $PO_3^{3-}$

Chlorate

Polyatomic ion with the chemical formula $ClO_3^{-}$ ($ClO_3^{1-}$)

Chlorite

Polyatomic ion with the chemical formula $ClO_2^{-}$ ($ClO_2^{1-}$)

Perchlorate

Polyatomic ion with the chemical formula $ClO_4^{-}$ ($ClO_4^{1-}$)

Hypochlorite

Polyatomic ion with the chemical formula $ClO^{-}$ ($ClO^{1-}$)

Bromate

Polyatomic ion with the chemical formula $BrO_3^{-}$ ($BrO_3^{1-}$)

Iodate

Polyatomic ion with the chemical formula $IO_3^{-}$ ($IO_3^{1-}$)

Periodate

Polyatomic ion with the chemical formula $IO_4^{-}$ ($IO_4^{1-}$)

Hydrogen carbonate (bicarbonate)

Polyatomic ion with the chemical formula $HCO_3^{-}$ ($HCO_3^{1-}$)

Permanganate

Polyatomic ion with the chemical formula $MnO_4^{-}$ ($MnO_4^{1-}$)

Silicate

Polyatomic ion with the chemical formula $SiO_3^{2-}$

Acetate

Polyatomic ion with the chemical formula $C_2H_3O_2^{-}$ (also written as $CH_3COO^{-}$)

Oxalate

Polyatomic ion with the chemical formula $C_2O_4^{2-}$

Chromate

Polyatomic ion with the chemical formula $CrO_4^{2-}$

Dichromate

Polyatomic ion with the chemical formula $Cr_2O_7^{2-}$

Hydroxide

Polyatomic ion with the chemical formula $OH^{-}$ ($OH^{1-}$)

Cyanide

Polyatomic ion with the chemical formula $CN^{-}$ ($CN^{1-}$)

Peroxide

Polyatomic ion with the chemical formula $O_2^{2-}$

Zinc ion

Transition metal ion without multiple oxidation states, having the formula $Zn^{2+}$

Cadmium ion

Transition metal ion without multiple oxidation states, having the formula $Cd^{2+}$

Silver ion

Transition metal ion without multiple oxidation states, having the formula $Ag^{+}$ ($Ag^{1+}$)

Ammonium

Cationic polyatomic ion with the chemical formula $NH_4^{+}$ ($NH_4^{1+}$)

Hydronium

Cationic polyatomic ion with the chemical formula $H_3O^{+}$ ($H_3O^{1+}$)

Hydrogen

Cation with the chemical formula $H^{+}$

Mercury 1

Polyatomic cation with the chemical formula $Hg_2^{2+}$