Question

what is halogen?????????????​

Answer 1

The halogens are a group in the periodic table consisting of five chemically related elements: fluorine, chlorine, bromine, iodine (I), and astatine. The artificially created element 117, tennessine, may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17.

Answer 2

Answer:

any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive non-metallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.

denoting lamps and radiant heat sources using a filament surrounded by the vapour of iodine or another halogen.

modifier noun: halogen