The
Periodic
Table Halogens The five halogens are non-metallic elements which are found in group 17 on the periodic table. Halogen actually means "salt former." Compounds using halogens are referred to as salts. Each halogen has 7 electrons in the outer shell which gives them an oxidation number of -1. At room temperature halogens can be found in all three states: solid (iodine and astatine), liquid (bromine), and gas (fluorine and chlorine). The halogens are:
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