The halogens are located on the left of the noble gases on the periodic table. These five toxic, non-metallic elements make up Group 17 of the periodic table and consist of: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).Jan 4, 2015he group of halogens is the only periodic table group that contains elements in three of the four main states of matter at standard temperature and pressure.
All of the halogens form acids when bonded to hydrogen. Most halogens are typically produced from mineralsor salts. The middle halogens, that is chlorine, bromine and iodine, are often used as disinfectants. Organobromides are the most important class of flame retardants. Elemental halogens are generally toxic.