What are similarities between astatine and bromine?

Astatine and bromine are both halogens, located in Group 17 of the Periodic Table, which means they share similar chemical properties, such as the ability to form salts when combined with metals. Both elements can exist in diatomic molecular forms (Br2 for bromine and At2 for astatine) and exhibit similar reactivity trends, with astatine being less reactive due to its higher atomic number and heavier atomic structure. Additionally, both elements have applications in chemistry and medicine, particularly in radiopharmaceuticals for astatine.