What are the properties of group 7 elements?
Group 7 – The halogens Properties of the elements in group 7 change moving down the group. The further down the table an element in group 7 is -the less reactive the element is -the higher its melting point and boiling point are The elements in Group 7 of the Periodic Table are all non-metals. They have been given the name halogens from the Greek words meaning ‘salt makers’. The halogens are the most reactive group of non-metals in the Periodic Table.