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  • Created by: Muneeta
  • Created on: 15-06-15 19:31
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  • C1
    • Electron configurations/ atomic metal structure
      • Working out an element's electronic structure
        • Find the element in the periodic table. Work out which period it is in, and draw that number of circles around the nucleus.
          • Work out which group the element is in and draw that number of electrons in the outer circle - with eight for Group 0 elements - except helium.Fill the other circles with electrons.
            • Remember - two in the first, eight in the second and third, and 18 in the fourth.
              • Finally, count your electrons and check that they equal the atomic number.
    • Limestone
      • Limestone is mainly calcium carbonate, CaCO3
        • When heated breaks down to form calcium oxide and carbon dioxide
      • Thermal decomposition
        • Calcium carbonate breaks down when heated
          • calcium carboate -heat> calcium oxide + carbon dioxide
      • Uses
        • cement
          • heat with clay
            • mix with sand and aggregate
              • concrete
            • mix with sand
              • mortar
        • concrete
        • mortar
    • Metal ores
      • Rock contains metal compounds that can be extracted
      • ways to extract the metals
        • reduction from its oxide using carbon
        • electrolysis of a molton compound
    • The earths atmosphere
      • 78% nitrogen
      • 21% oxygen
      • 1% other gases eg argon, water vapour and carbon dioxide
    • Evolution of earths atmosphere
      • carbon dioxide levels have gone down
      • oxygen levels have gone up
        • Photosynthesis by plants and algae is one reason for these changes
    • Fractional distilation
      • As you go up the fractionating column, the hydrocarbons have
        • lower boiling points
          • lower viscosity (they flow more easily)
            • higher flammability (they ignite more easily)
    • Polymers
      • polymers are large molecules formed from many identical smaller molecules


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