What are halogens??
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The halogens are a group in the periodic table consisting of five or six 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.
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Halogens are chemical elements that form a salt when reacts with metal. There are five halogens in the periodic table of chemical elements: fluorine, chlorine, bromine, iodine and astatine . The halogens are all highly reactive, which means they're quick to form bonds with other elements.
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