Final answer:
Bromine (Br) is the halogen element in the list.
Step-by-step explanation:
The element that is a halogen is bromine (Br). The halogens include fluorine, chlorine, bromine, iodine, and astatine. These elements react readily with metals to form compounds, such as sodium chloride and calcium chloride. The name "halogen" is derived from the Greek words for "salt forming."