Chemistry AS EL CI 3.1

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  • Created by: A.B.
  • Created on: 23-10-13 15:37
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  • EL Chemical Bonding and Properties CI 3.1
    • What type of bond?
      • Metal + Metal
        • Metallic
      • Metal + Non-metal
      • Non-metal + Non-metal
        • Covalent
    • Properties depend on bonding
      • Ionic Lattice
        • eg NaCl
        • Ionic bonds
        • High melting point
        • Usually soluble in water
        • Only conducts electricity if molten or in a solution
      • Giant Covalent Network
        • eg SiO  or diamond
        • Covalent bonds
        • High melting point
        • Insoluble in water
        • Don't conduct electricity, apart from graphite.
      • Simple Molecular
        • eg CO     or H O
        • Covalent bonds
        • Low melting point
        • Usually insoluble
        • Don't conduct
      • Metallic Lattice
        • eg Na or Mg
        • Metallic bonds
        • High melting point
        • Insoluble in water
        • Conducts electricity
    • Ionic Bonding
      • Charged ions result of atom trying to gain full outer shell of electrons by losing or gaining
      • The cations (positive ions) and anions (negative ions) produced are held together in a giant ionic lattice.
        • Electrostatic attraction between cations and anions.
        • Sodium Chloride
          • Ionic Bonding
            • Charged ions result of atom trying to gain full outer shell of electrons by losing or gaining
            • The cations (positive ions) and anions (negative ions) produced are held together in a giant ionic lattice.
              • Electrostatic attraction between cations and anions.
              • Sodium Chloride
      • Covalent Bonding
        • Share a pair of electrons
        • Dative covalent bond
          • Both electrons in pair come from same atom
        • Held together by electrostatic attraction between the positive nuclei of the two atoms and the shared pair of electrons.
      • Metallic bonding
        • Regular lattice
        • Delocalised electrons

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