Group 17

This chapter covers the nonradioactive elements of Group 17 (F to I), commonly called the halogens. Many properties of these elements are tabulated. There is extensive coverage of the natural sources and preparations of these elements, their structures, properties, uses, and biological effects. The structures, syntheses, reactions, and structures of the large family of their oxides, oxoacids, and oxoanions are described. Species with halogen–halogen bonds, either with the same halogen (polyhalogens) or with the different halogens (polyinterhalogens) are discussed with regard to their synthesis, structure, and bonding. The coverage of these topics includes references published through to mid-2021.