The halogens or halogen elements (//) are a group in the periodic table consistin o five chemically relatit elements, fluorine (F), chlorine (Cl), bromine (Br), iodine (I), an astatine (At). The airtifeecially creatit element 117 (ununseptium) mey an aa be a halogen. In the modren IUPAC nomenclatur, this group is kent as group 17.
The group o halogens is the anly periodic table group that contains elements in aw three familiar states o matter at staundart temperatur an pressur. Aw o the halogens furm acids when bondit tae hydrogen. Maist halogens are typically produced frae minerals or sauts. The middle halogens, that is, chlorine, bromine an iodine, are eften uised as disinfectants. The halogens are an aa aw toxic.