Polarity_Explanation

Polarity_Explanation - 3 ) or all the atoms bonded to the...

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Determining whether a Molecule is Polar or Nonpolar The ideal way to identify a polar molecule is to look at its 3-dimensional structure. Determine if the center of positive charge ( +) is different from the center of negative charge( ∂- ). If so, it is polar. If there are no partial charges or if the centers are in the same place, it is a nonpolar molecule. Because some of us have trouble visualizing these structures, there are other ways to identify polar/nonpolar molecules from Lewis structures: 1. A molecule or polyatomic ion is nonpolar if : all the atoms are identical (it is an element, eg O
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Unformatted text preview: 3 ) or all the atoms bonded to the central atom are identical AND there are no nonbonding electrons on the central atom (eg. CCl 4 ). 2. A molecule or polyatomic ion is polar if : the molecule has polar bonds AND there is at least 1 nonbonding electron pair on the central atom. There are two main exceptions to this: The square planar geometry that results when there are 2 nonbonding electron pairs on the central atom is nonpolar (eg. XeF 4 ). The linear geometry that occurs when there are 3 nonbonding electron pairs on the central atom is nonpolar (XeF 2 )....
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