In which group on the Periodic table are halogens located?

Halogens are located in Group 7 of the Periodic Table. This group is characterized by its elements, which include fluorine, chlorine, bromine, iodine, and astatine. Halogens are known for their high reactivity, particularly with alkali metals and alkaline earth metals, forming various salts. The placement in Group 7 reflects their similar chemical properties, such as the tendency to gain one electron to achieve a full outer electron shell, which makes them very reactive.

The distinction of halogens within this group is significant; they have seven valence electrons, which classifies them as elements that readily participate in chemical reactions to achieve a stable octet. This property of reactivity sets them apart from elements in other groups.

Other groups listed in the options contain different types of elements — for example, Group 1 consists of alkali metals, while Groups 6 and 8 contain chalcogens and noble gases, respectively. Understanding the specific location and characteristics of halogens in Group 7 is fundamental to grasping their behavior and roles in various chemical reactions.