C3 trends in group 1 and group 7 (transition metals)

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  • Created by: SophGCSE
  • Created on: 29-09-16 18:03
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  • Trends in group 1 and 7 transition metals
    • The group 1 elements are found on the left hand side of the periodic table
      • They are called alkali metals because they form alkali compounds
      • their atoms all have one electron on their outermost shell
      • group 1 elements all have similar properties
    • Reactions of group 1 elements with water / oxygen
      • Lithium, sodium, potassium all react with water to form a metal hydroxide and hydrogen
      • need to be stored under oil to prevent them reacting with h20 or 02
      • when reacted with oxygen, group 1 metals become dull
      • Lithium = red flame, sodium = yellow-orange flame, potassium = lilac flame
    • Transition metals are in a large block between group 2, 3
      • they are metals
      • They are good conductors of heat and electricity
      • They can be hammered or bent into shape easily
    • Group 7 elements are also know as halogens
      • They have 7 electrons in their outer shell
      • in a displacement reactor a less reactive element is removed and replaced by a more reactive element
      • chlorine is used to sterilise drinking water and in pesticides and plastics , iodine can be used to sterilise wounds
        • Sodium chloride, or common salt, is used to preserve food, as flavouring and to manufacture chlorine
      • group 7 metals react with alkali metals (group  1)


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