Chemisty - C4 - OCR Gateway - Mindmap

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  • Chemistry - C4
    • Group 1 - Alkali Metals
      • One outer electron
      • Physical properties
        • Low melting and boiling points
        • Low density
        • Very soft
      • Form ionic compounds
      • Similar chemical properties
      • Lithium, Sodium, Potassium, Rubidium, Caesium, Francium
      • Very reactive
      • Go down group: more reactive
      • Form a +1 ion
      • Reacts with water to make hydroxide and hydrogen
    • Group 7 - Halogens
      • Flourine, Chlorine, Bromine, Iodine, Asatine
      • Similar chemical properties
      • Exist as molecules containing 2 atoms
      • A pair of electrons in a covalent bond
      • Go down group: melting and boiling point increases
      • At room temperature...
        • Chlorine = green gas
        • Bromine = red/brown liquid
        • Iodine = dark grey solid
      • Reacts with alkali metals to make salts
    • Group 0 - Noble gases
      • Unreactive, colourless gases
      • Helium, Neon, Argon, Krypton, Xenon, Radon
      • Full outer shell
      • Wont set on fire
      • Go down group: boiling and melting point and density increases
    • Reactivity of Metals
      • Practical: Put different metals into dilute hydrochloric acid and see if it bubbles
      • The faster the bubbles, the faster the reaction
      • Very reactive metals (e.g magnesium) will fizz strongly
    • The Reactivity Series and Displacement
      • The reactivity series
        • Potassium, Sodium, Calcium, Magnesium, Aluminium, Zinc, Iron, Copper, Silver
          • Most reactive
          • Least reactive
      • Displacement
        • More reactive metals displace less reactive ones
        • If you put a more reactive metal into a salt solution containing the less reactive metal it will displace it


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