Ionic compound

In chemistry, an ionic compound is a compound made of ions. They have strong ionic bonds between particles. Lots of energy (heat) is required to break the bond apart, resulting in high melting and boiling points. The ions join because they have different charges. Compounds of metals and non-metals are usually ionic. They are made when two or more atoms come close together and an electron goes from one atom to the other atom. The electron does this because both atoms want a full outer shell, similar to those of the noble gases.

  Group I  Group II  Group III  Group IV  Group V  Group VI  Group VII  Group VIII Example Element  Na  Mg  Al  C  N  O  Cl  He Charge  1+  2+  3+  See Note 1  3-  2-  1-  See Note 2 Symbol of Ion  Na+  Mg2+  Al3+  See Note 1  N3-  O2-  Cl-  See Note 2

Note 1: carbon and silicon in Group 4 usually form covalent bonds by sharing electrons.

Note 2: the elements in Group 0 do not react with other elements to form ions

Physical properties
 Physical Properties  Ionic Compounds State at room temperature  Solid Electrical conductivity  As Solid: No

Liquid (melted): Yes

Dissolved in solution: Yes (if soluble) Boiling point and Melting Point High Solubility in water Often high Heat conductivity  Low

Category:Chemical compounds