Posted by Lauren on Tuesday, December 11, 2007 at 8:22pm.
Look up the electronegativity of H and F, for example. H is 2.1, F is 4.0, subtract them to get a difference of 1.9 so HF is polar. Strictly speaking, there are no non-polar bonds in those compounds listed. The difference in electronegativity must be zero to have a non-polar bond. ICl3 probably comes the closest to being non-polar but the difference is not zero.
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