P9+-+Halogen

= __**Halogens**__ = Halogens are non-metallic elements. Halogen are in group 17 on the periodic table and exist in all three states of matter.
 * **Solid-** Iodine, Astatine
 * **Liquid-** Bromine
 * **Gas-** Fluorine, Chlorine

Halogens are used everywhere in everyday life. The main source that Halogens are used for is lighting. Halogens are also used for cleaning. Although cleaning sounds safe, if used too much it can be poisonous and/or dangerous. Halogens have very low melting points and very low boiling points. Also, Halogens have mostly orthorhombic and cubic crystal structures. The most characteristic chemical feature of the halogens is their ability to oxidize. Fluorine has the strongest oxidizing ability, so other elements which combine with fluorine have their highest possible oxidation number.

The Halogen elements include:
 * Fluorine
 * Chlorine
 * Bromine
 * Iodine
 * Astatine

"Chemical Elements.com - Halogens." //Chemical Elements.com - An Interactive Periodic Table of the Elements//. Web. 26 Oct. 2009. .