Compound Naming : Polyatomic Ions and Multivalent Ions

Polyatomic Ions

NH₄⁺

ammonium

ClO₄^-

perchlorate

C₂H₃O₂^-

acetate

ClO₃^-

chlorate

CN^-

cyanide

ClO₂^-

chlorite

OH^-

hydroxide

ClO^-

hypochlorite

NO₃^-

nitrate

NO₂^-

nitrite

MnO₄^-

permanganate

CO₃^2-

carbonate

HCO₃^-

bicarbonate or hydrogen carbonate

CrO₄^2-

chromate

Cr₂O₇^2-

dichromate

C₂O₄^2-

oxalate

SO₄^2-

sulfate

HSO₄^-

bisulfate or hydrogen sulfate

SO₃^2-

sulfite

HSO₃^-

bisulfite or hydrogen sulfite

S₂O₃^2-

thiosulfate

PO₄^3-

phosphate

HPO₄^2-

biphosphate or hydrogen phosphate or monohydrogen phosphate

H₂PO₄^-

dihydrogen phosphate

BO₃^3-

borate

AsO₄^3-

arsenate

AsO₃^3-

arsenite

Multivalent Ions

Cu²⁺

copper (II) or cupric

Cu⁺

copper (I) or cuprous

Cr³⁺

chromium (III) or chromic

Cr²⁺

chromium (II) or chromous

Co³⁺

cobalt (III) or cobaltic

Co²⁺

cobalt (II) or cobaltous

Fe³⁺

iron (III) or ferric

Fe²⁺

iron (II) or ferrous

Pb⁴⁺

lead (IV) or plumbic

Pb²⁺

lead (II) or plumbous

Sn⁴⁺

tin (IV) or stannic

Sn²⁺

tin (II) or stannous

Cr³⁺

chromium (III) or chromic

Cr²⁺

chromium (II) or chromous

Hg²⁺

mercury (II) or mercuric

Hg₂²⁺

mercury (I) or mercurous

Ni³⁺

nickel (III)

Ni²⁺

nickel (II)

Some Transition Metal Ions

Ag⁺

silver

Cd²⁺

cadmium

Zn²⁺

zinc