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A 'monoatomic ion' is an ion consisting of a single atom. A 'type I' binary ionic compound contains a metal (cation) that forms only one type of ion. A 'type II' ionic compound contains a metal that forms more than one type of ion, i.e., ions with different charges

Contents

Common monatomic ions

See also

Common monatomic ions

Common type I cations
Hydrogen	H+
Lithium	Li+
Sodium	Na+
Potassium	K+
Caesium	Cs+
Beryllium	Be2+
Magnesium	Mg2+
Calcium	Ca2+
Barium	Ba2+
Aluminum	Al3+
Silver	Ag+
Zinc	Zn2+

Common anions
hydride	H−
fluoride	F−
chloride	Cl−
bromide	Br−
iodide	I−
oxide	O2−
sulfide	S2−
nitride	N3−
phosphide	P3−

Common type II cations
Systematic name	Ion	Alternate name
iron(III)	Fe3+	ferric
iron(II)	Fe2+	ferrous
copper(II)	Cu2+	cupric
copper(I)	Cu+	cuprous
cobalt(III)	Co3+	cobaltic
cobalt(II)	Co2+	cobaltous
tin(IV)	Sn4+	stannic
tin(II)	Sn2+	stannous
lead(IV)	Pb4+	plumbic
lead(II)	Pb2+	plumbous
mercury(II)	Hg2+	mercuric
mercury(I)	Hg22+ ★	mercurous

★ note that mercury (I) ions always occur bound together to form Hg₂.

See also

★ monatomic

★ polyatomic ion