Monatomic ion

A monatomic 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

Common Monatomic Ions

Common Type I Cations
hydrogen	H+
lithium	Li+
sodium	Na+
potassium	K+
cesium	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
Systemic 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

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