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  Halogens

  Author:Patricia G. SchroederFrom:The Gale Encyclopedia of Science (Vol. 4. 6^th ed.)

  20212,042 words Topic overview 1120LThe halogens are a group of chemical elements that includes fluorine, chlorine, bromine, iodine, and astatine. Halogen comes from Greek terms meaning “to produce sea salt.” None of the halogens occur naturally in the...