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Which Bond is More Polar: Carbon Hydrogen or Phospohorous Hydrogen?

  1. Jun 9, 2010 #1
    I had a question in a lab about which elements are least likely to form polar covalent bonds with hydrogen. From what I understand, what governs how polar a bond is, is the electronegativity of the element. The answer said that Carbon was the one which was least likely to form the bond, but using my periodic table I see that phosphorous has the same electronegativity as hydrogen.

    So shouldn't phosphorous share the bond most evenly? I've asked a couple other people and they say that phosphorous might be an exception because it can expand its octet...but that doesn't make sense to me.

    Thank you,

  2. jcsd
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