Introduction

The Group 7 elements are called the halogens. They are placed in the vertical column, second from the right, in the periodic table.

Periodic table with group 7 halogens highlighted: fluorine, chlorine, bromine, iodine and astatine

Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals. The term ‘halogen’ means ‘salt former’.