Halogens Group 17

General objective of this lecture is to present Halogens; Group 17.  All the elements in Group 17 are nonmetals except for astatine, which is a radioactive metalloid.  These elements are called halogens, which means “salt-former.”  All of the halogens form salts with sodium and with the other alkali metals The halogen fluorine is the most reactive of the halogens in combining with other elements.