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Beryllium Fluoride

  1. Dec 15, 2011 #1
    Can anyone explain to me why this is a molecule? The difference in electronegativity is larger than 2.0 on the Pauling scale - it should be ionic?
  2. jcsd
  3. Dec 18, 2011 #2


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    Staff: Mentor

    Difference in electronegativity is only a rule of thumb, sometimes it fails.
  4. Dec 19, 2011 #3


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    I'm curious. How did you determine that BeF2 is covalent? Did you use Fajan's Rule? If you did, you should look at the structure of BeF2 and think about dipole moments.
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