electronegativity and polarity
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Electronegativity and Polarity. Pg. 61. Electron Affinity . The measure of the tendency of an atom to except an electron Same trend as electronegativity The character and type of bond can be predicted by looking at the electronegativity values of each element. Polar covalent bonds.

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Presentation Transcript
electron affinity
Electron Affinity
  • The measure of the tendency of an atom to except an electron
  • Same trend as electronegativity
  • The character and type of bond can be predicted by looking at the electronegativity values of each element
polar covalent bonds
Polar covalent bonds
  • Covalent compounds in which the atoms are the same share the electrons equally
  • Covalent compounds in which the elements are different result in unequal sharing of electrons
  • Creates a polar covalent bonds
  • Use to show areas of partial negativity and to show areas of partial positivity.
molecular polarity
Molecular Polarity
  • Molecules are either polar or nonpolar
  • Polar molecules have a partial negative charge on one side and partial positive on the other.
  • Called a dipole
  • Symmetrical compounds are nonpolar
steps to determining polarity
Steps to determining polarity
  • 1. Consider each bond in the compound and use the symbols to determine if there is a positive end and a negative end
  • 2. consider the shape of the molecule. If there is an end that is positive and an end that is negative it is polar
  • Ex. CCl4, AlCl3, SiO2
practice pg 62
Practicepg. 62
  • Use the compounds from page 60 and decide if each is polar or nonpolar
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