Identify Group 7 elements as halogens.

Group 7 elements are known as halogens, which include fluorine, chlorine, bromine, iodine, and astatine. These elements are characterized by having seven electrons in their outer shell, which makes them highly reactive, particularly with alkali metals and alkaline earth metals. Halogens typically exist as diatomic molecules, meaning they form pairs of atoms (e.g., Cl2). Their reactivity and properties are influenced by their electron arrangement, leading to trends in boiling and melting points as you move down the group.