What do polar covalent bonds result from?

1 Answer
Jun 16, 2017

The difference between electronegativity of the binding atoms.


(Refer to the periodical table element with electronegativity value)
Consider a bond to be non-polar if this difference is smaller than #0.4# (or #0.2 ~ 0.5# in certain cases )
Also, bonds are no longer considered "covalent" if the difference is greater than #2.0#, as electron "transfer" occurs.