Intermediate bonding and bond polarity - 2

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  • Created by: Shannon
  • Created on: 08-05-14 09:30
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  • Intermediate bonding and bond polarity
    • Electronegativity
      • The ability to attract the bonding electrons in a covalent bond
    • The ionic -> covalent continuum
      • There is a gradual transition from ionic -> covalent
      • Purely ionic and purely covalent bonding are extremes
    • Polar bonds and polar molecules
      • What makes a polar bond?
        • The greater the difference in electronegativity, the more polar the bond
      • Polar bonds don't always make polar molecules
        • In a more complicated molecule, they may have several polar bonds.
          • If the polar bonds are arranged so they point in opposite directions, they cancel out. This means the molecule is non polar over all.
      • The strength of a bond is related to its length
        • The stronger the bond, the higher the bond enthalpy, the shorter the bond length
  • The stronger the bond, the higher the bond enthalpy, the shorter the bond length

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