Chemistry Halogens

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  • Chemistry
    • Group 7 Elements
      • Halogens
      • Fluorine, chlorine, bromine and iodine.
      • At room temperature: Chlorine is a green gas, Bromine is an orange liquid, Iodine is a grey solid.
        • Group 7 elements all have 7 electrons in their outer shell.
          • Group 7 elements have similar properties.
      • Chlorine can sterilise water.
      • Chlorine can make pesticides and plastics.
      • Halogens react with alkali metals to give metal halides.
        • 2Na + Cl2 = 2NaCl
          • Sodium + Chlorine = Sodium Chloride
            • Properties of fluorine and astatine can be predicted as there are trends down group 7.
              • Reactivity decreases down the group.
            • DISPLACEMENT: Halogen reacts with solution of metal halides.
              • Chlorine displaces bromides and iodides.
              • Bromine displaces iodides.
              • Cl2 + 2NaBr = 2NaCl + Br2
                • Chlorine + Sodium Bromide = Sodium Chloride + Bromine
    • Transition Elements

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