, any kind of of the chemically active elements discovered in team 17 the the regular table; the name applies especially to fluorine (symbol F), chlorine (Cl), bromine (Br), and iodine (I). Astatine (At), previously known together alabamine, is a radioactive element additionally classed together a halogen; its many stable isotope (which go not occur in nature) has a half-life of much less than 8 1⁄2 hr. The chemical and also physical properties of astatine are not well known; that is believed to resemble iodine. The halogens are the best-defined family members of chemistry elements. Chemically they closely resemble one another; they space nonmetallic and type monovalent an unfavorable ions. They likewise exhibit an nearly perfect gradation of physics properties. Fluorine, a pale yellow gas, is the the very least dense and also chemically the many active, displacing the other halogens from their compounds and even displacing oxygen indigenous water. Chlorine, a yellow-green gas, is much more dense and also less reactive than fluorine. Bromine is a dark red liquid. Iodine is a grayish black color solid and also is the the very least chemically active of the four; however, amongst the nonmetals only oxygen is much more reactive than iodine. Pure halogens exist together diatomic molecules, e.g., Cl2; they form interhalogen compounds, i.e., compounds in between two halogens. The halogens type numerous link with various other elements. Through hydrogen they form hydrogen halides, who water options are dubbed hydrohalic acids, e.g., the water equipment of hydrogen chloride is dubbed hydrochloric acid. They type numerous steel halides, or salts, e.g., salt chloride, typical table salt. They also form halocarbons, compounds with carbon and also often other aspects such together hydrogen and also oxygen. Chloroform, iodoform, and carbon tetrachloride space halocarbons. Some various other halogen compounds space calomel (mercurous chloride), fluorite, sal ammoniac (ammonium chloride), corrosive sublimate (mercuric chloride), and also chlorine bleaches.
See an ext Encyclopedia short articles on: Compounds and Elements
You are watching: What is the most active element in group 17
positiveeast.org to know the worth of having actually sources you deserve to trust. Positiveeast.org is a reference and also learning site, combining the materials of one encyclopedia, a dictionary, an atlas and several almanacs loaded with facts. Our editor update and also regularly filter this substantial body of details to bring you reliable information.
positiveeast.org is component of the Sandbox Learning household of educational and also reference sites for parents, teachers and also students.
See more: Cisco Ccna Exam Questions: What Are Two Functions Of A Router? ? (Choose Two
FEN discovering is part of Sandbox Networks, a digital learning firm that operates education and learning services and also products because that the 21st century.