AS Chemical Bonding

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  • Created by: zikra98
  • Created on: 30-09-14 18:19
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  • Chemical Bonding
    • Ionic Bonding
      • Electrons are transferred from one atom to another
      • Non-metals + metals
      • Ionic Compounds
        • Made up of positive and negatively charged ions
        • Have high melting and boiling points
        • Electrically neutral
          • sum of positive charged = sum of negative charges
            • overall charge is 0
      • ionic bond attracts in all directions
    • Covalent Bonding
      • Electrons are shared between atoms
        • occurs because the atoms in the compound both seek to gain electrons
        • Occur in compounds consisting of non-metals
        • an electron pair occupies the space between the two atoms
          • negatively charged electrons are attracted to the positive charges if both nuclei
      • directional attraction - only between the two atoms involved
      • Dative Covalent Bond
        • a shared pair of electrons in which both electrons come from the same atom
    • Dative Covalent Bond
      • a shared pair of electrons in which both electrons come from the same atom
  • Gained an electron = negative
    • Non-metal ion = negative
    • Oppositely charged ions are formed
      • Ionic Bonding
        • Electrons are transferred from one atom to another
        • Non-metals + metals
        • Ionic Compounds
          • Made up of positive and negatively charged ions
          • Have high melting and boiling points
          • Electrically neutral
            • sum of positive charged = sum of negative charges
              • overall charge is 0
        • ionic bond attracts in all directions
      • oppositely charged ions are attracted to each other by electrostatic forces
        • creates ionic bond
    • Non-metals of Groups 5-4 gain electrons- form negative ions

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