The Chemistry of the Halogens - Covers their properties, methods of preparation, general trends, the hydrogen halides, and oxyacids of the halogens and their salts.
Doc Brown's Chemistry Clinic: The Halogens - Includes an overview, general properties, reactivity trends, and information about the industrial electrolysis of sodium chloride solution.
Visual Elements: The Halogens - Overview, general properties, and chemical data for the group.
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