Which group of elements is known as halogens?

The halogens are found in Group 17 of the periodic table. This group includes the elements fluorine, chlorine, bromine, iodine, and astatine. Halogens are characterized by having seven electrons in their outermost electron shell, which makes them highly reactive, particularly with alkali metals and alkaline earth metals. This reactivity is due to their tendency to gain one additional electron to achieve a stable octet configuration, making them effective in forming salts. Their properties include a wide range of physical states at room temperature—from gases like fluorine and chlorine to solids like iodine—and they exhibit various colors and odors. These distinct characteristics of halogens showcase their placement and relevance in Group 17.