Editing Halogenation (section)

==Inorganic chemistry==
All [[Chemical element|elements]] aside from [[argon]], [[neon]], and [[helium]] form [[fluorides]] by direct reaction with [[fluorine]]. [[Chlorine]] is slightly more selective, but still reacts with most [[metals]] and heavier [[nonmetals]]. Following the usual trend, [[bromine]] is less [[Reactivity (chemistry)|reactive]] and [[iodine]] least of all. Of the many reactions possible, illustrative is the formation of [[gold(III) chloride]] by the chlorination of [[gold]]. The chlorination of metals is usually not very important industrially since the [[chlorides]] are more easily made from the [[oxides]] and [[hydrogen chloride]]. Where chlorination of [[inorganic compounds]] is practiced on a relatively large scale is for the production of [[phosphorus trichloride]] and [[disulfur dichloride]].<ref>{{Greenwood&Earnshaw2nd}}</ref>