Chemisty - C4 - OCR Gateway - Mindmap - Mindmap in GCSE Chemistry

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Created on: 12-06-18 18:33

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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