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Which are polar or nonpolar?

  1. Mar 18, 2007 #1
    1. The problem statement, all variables and given/known data
    The question asks which are polar or non-polar: [tex]ClO_{4}^{-},H_{2}S,SF_{6},PCl_{3}[/tex] ?

    All molecules are tetrahedral and polar except for [tex]SF_{6}[/tex] which is octahedral and nonpolar.
    Last edited: Mar 18, 2007
  2. jcsd
  3. Mar 18, 2007 #2
    It has something to do with the electron configuration. Like H-S-H, it is not linear. And the center of H is not the same as S. So you can analysize the electron configuration.Therefore you can determine whether it is polar or not.
  4. Mar 18, 2007 #3


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    linuxux, you may wish to consider the relative electronegativity values of each atom that makes up the molecule.

    As an aside, not all molecular gasses are polar; take hydrogen, chlorine, methane for example. Polarity depends not only on the electronegativity of each atom, but also the actual shape of the molecules themselves.
  5. Mar 18, 2007 #4
    i already did all the lewis dot diagrams, they all fit into the electrostatic repulsion geometry, the only one that didn't have an all symmetric geometry was [tex]PCl_{3}[/tex], unless i did something wrong, i haven't considered electro negativity yet however.
    Last edited: Mar 18, 2007
  6. Mar 18, 2007 #5
    okay, is any of that right?...
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