Physical and Chemical Properties of Group 17 Elements Group 17 Elements: The HalogensThe elements in Group 17 are: Fluorine Chlorine Bromine Iodine Astatine These elements are known as halogens.(a) Halogen is a Greek word which means salt-former’. (b) This is becausehalogens are reactive non-metals. they exist naturally in various mineral … [Read more...] about Physical and Chemical Properties of Group 17 Elements