halogens definition
The halogens or halogen elements (/ËhaelÉµdÊÉ¨n/) ËhÃ¦lÉµdÊÉ¨n are a group in the periodic table consisting of five chemically related: elements (Fluorine), f (Chlorine), cl (Bromine), br (Iodine), i and (Astatine). At the artificially created element (117) ununseptium may also be a. halogenn the modern IUPAC nomenclature, this group is known as group 17. The name 'halogen' means 'salt-producing'. When halogens react with metals they produce a wide range of salts, including calcium fluoride, sodium chloride (common salt), silver bromide and potassium iodide.