Structure and Bonding

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  • Created on: 02-06-19 10:31
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  • Structure and Bonding
    • Ionic Compounds
      • Ionic Bonding
        • Electrostatic forces of attraction
        • Between positively and negatively charged ions
      • Properties
        • High  melting and boiling point
          • Strong forces between oppositely charge ions
          • Large amountthermalenergy needed
            • Strong forces between oppositely charge ions
      • Strong bonds between atoms in a small molecule
      • Between a metal and a non-metal
    • Carbon
      • Diamond
        • Very hard
          • Carbon atoms bonded four others
          • Strong bonds
        • Doesn't conduct
          • All electrons are bonded
      • Graphite
        • Soft
          • Giant layers of atoms can slide over each other easily
          • Weak forces
        • Conducts electricity
    • Metals and alloys
      • Metallic bonding
        • Metal ions held together by electrons from the outermost shell
          • The electrons in the metal are free to move around
      • Alloys are harder than pure metals
      • Alloys have different size atoms
      • Makes it harder to slide over each other because the rows of atoms are disorted
      • Alloys can conduct and metals can't
        • Alloys have a sea of delocalised electrons
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