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