Common Monatomic and Polyatomic Ions and Variable Oxidation State Metals

Vocabulary review flashcards covering common monatomic ions, polyatomic cations and anions, and multivalent transition metal ions with both Stock system and classical system nomenclatures.

Ammonium

NH4 Charge: 1+

Hydronium

H3O 1+

Hydroxide

A polyatomic anion with the chemical formula $OH^-$ and a charge of $1-$.

Cyanide

A polyatomic anion with the chemical formula $CN^-$ and a charge of $1-$.

Peroxide

$O_2^{}$ Charge: $2-$.

Carbonate

A polyatomic anion with the chemical formula $CO_3^{2-}$ and a charge of $2-$.

Oxalate

A polyatomic anion with the chemical formula $C_2O_4^{2-}$ and a charge of $2-$.

Nitrite

NO2 Charge: 1-

Nitrate

A polyatomic anion with the chemical formula $NO_3^-$ and a charge of $1-$.

Phosphite

PO3 3-

Phosphate

A polyatomic anion with the chemical formula $PO_4^{3-}$ and a charge of $3-$.

Sulfite

SO3 2-

Sulfate

SO4 2-

Thiosulfate

A polyatomic anion with the chemical formula $S_2O_3^{2-}$ and a charge of $2-$.

Hypochlorite

A polyatomic anion with the chemical formula $ClO^-$ and a charge of $1-$.

Chlorite

$ClO_2^{}$ Charge: $1-$.

Chlorate

A polyatomic anion with the chemical formula $ClO_3^-$ and a charge of $1-$.

Perchlorate

ClO₄ Charge: 1-

Acetate

A polyatomic anion represented by the formula $CH_3COO^-$ or $C_2H_3O_2^-$, with a charge of $1-$.

Arsenate

AsO4 Charge: 3-

Borate

A polyatomic anion with the chemical formula $BO_3^{3-}$ and a charge of $3-$.

Silicate

A polyatomic anion with the chemical formula $SiO_3^{2-}$ and a charge of $2-$.

Permanganate

MnO4 Charge: 1-

Chromate

A polyatomic anion with the chemical formula $CrO_4^{2-}$ and a charge of $2-$.

Dichromate

$Cr_2O_7^{}$ Charge: $2-$.

Formate

CHO2 Charge: 1-

Hydrogen Carbonate (Bicarbonate)

A polyatomic anion with the chemical formula $HCO_3^-$ and a charge of $1-$.

Hydrogen Sulfite (Bisulfite)

A polyatomic anion with the chemical formula $HSO_3^-$ and a charge of $1-$.

Hydrogen Sulfate (Bisulfate)

$HSO_4^{}$ Charge: $1-$.

Hydrogen Phosphate

HPO4 Charge:2-

Dihydrogen Phosphate

H2PO4 Charge: $1-$.

Hydride

A monatomic anion of hydrogen with the formula $H^-$ and a charge of $1-$.

Carbide

An anion of carbon represented by the formula $C^{4-}$ (or $C_2^{2-}$).

Nitride

A monatomic anion of nitrogen with the formula $N^{3-}$ and a charge of $3-$.

Phosphide

A monatomic anion of phosphorus with the formula $P^{3-}$ and a charge of $3-$.

Chromium(II) / Chromous

A chromium cation with the formula $Cr^{2+}$; named chromium(II) in the Stock system and chromous in the classical system.

Chromium(III) / Chromic

Cr Charge:3+

Cobalt(II) / Cobaltous

Co^2+

Cobalt(III)/Cobaltic

$$Co^{3+}$$

Copper(I)/Cuprous

Cu+

Copper(II) / Cupric

A copper cation with the formula $Cu^{2+}$; named copper(II) in the Stock system and cupric in the classical system.

Iron(II) / Ferrous

$$Fe^{2+}$$

Iron(III) / Ferric

Fe³⁺

Lead(II) / Plumbous

Pb2+

Lead(IV) / Plumbic

Pb4+

Manganese(II) / Manganous

$$Mn^{2+}$$

Manganese(III)/Manganic

Mn 3+

Manganese(IV)

Mn4+

Mercury(I) / Mercurous

$$Hg_2^{2+}$$

Mercury(II) / Mercuric

Hg²⁺

Tin(II) / Stannous

A tin cation with the formula $Sn^{2+}$; named tin(II) in the Stock system and stannous in the classical system.

Tin(IV) / Stannic

$$Sn^{4+}$$