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Chemistry (7's (Sediment (Solid left over at saturation), Saturated…

- - - - Travles in pairs
  - - - Air
        
        Nitrogen
        
        Oxygen
        
        Argon
        
        Carbon dioxide
        
        Water vapour
        
        Separation
        
        Cooling
      - Sea water
        
        Sand
        
        Water
        
        Salt
      - Crude oil
        
        Natural gas
        
        Petrolium
        
        Naptha
        
        Kerosine
        
        Diesel
        
        Lubricating oil
        
        Bitumen
        
        Separation
        
        Fractional distillation
  - - - Dull
      - Britlle
      - Low melting point
    - - Copper
        
        Wires and pipes (good conductor of heat and electricity)
      - Aluminium
        
        Planes and pans (lightweight)
      - Iron
        
        Buildings (strong)
    - - Sulfur
        
        Yellow, solid, used in making sulfuric acid
      - Chlorine
        
        Green gas, used to sterilise water
      - Iodine
        
        Grey solid, purple gas, sublimes, used to sterilise cuts