OCR Gateway Additional Science GCSE Chemistry the group 7 elements

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  • Uses of Halogens
    • Fluorine
      • Teflon
        • Non-stick lining on pans
      • dissolves glass
      • Toothpastes - prevent tooth decay
      • Water supplies - strengthens teeth
    • Chlorine
      • common salt - sodium chloride
      • solvents
      • killing bacteria
        • bleach
          • whiten paper
        • drinking water
        • swimming pools
      • hydrochloric acid
      • pesticides and weedkillers
      • antiseptics and disinfectants
    • Bromine
      • pesticides
      • medicines
      • Silver bromide - photographic film
      • pesticides and weedkillers
    • Iodine
      • antiseptic
      • dissolved in alcohol - put on cuts

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