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_+_ _+_ _-_ Polar Molecules

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									Polar Molecules
Electrons in a covalent bond are not shared
evenly
(+)



                           (-)



(+)


 Polar Covalent - Water Molecule
 Polar Molecules (like water)
 Poles = opposite ends of something

 Molecules can have “poles”:
   Positive Pole vs. Negative Pole
Polar Molecules (like water)
 Polar molecules have slight, partial
 charges at either end.
   One end is slightly negative
   The other end is slightly positive
   Caused by the uneven sharing of
    electrons in a covalent bond
Water: Structural Formula
      (-)
      O
 H          H
(+)         (+)
Hydrogen Bonds (H-bonds)
 Attraction between the slightly negative
 and slightly positive sides of polar
 molecules
 Not a true chemical bond (does not create
 new molecules)

 A relatively weak force (Easily broken)
 Most common example = water
Hydrogen Bonds and Water




                    H-bonds

								
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