Arrange in the order of increasing percent ionic character

Question

Did I do this correctly?

 

in increasing order of percent ionic character:

N-N, S-O, Cl-F, K-O, Li-F

Answer 1

Look at the ∆EN, i.e. difference in electronegativity.

N-N ∆N = 0

S-O ∆EN = 0.86

Cl-F ∆EN = 0.82

K-O ∆EN = 2.62

Li-F ∆EN = 3.00

 

And applying the formula 1-e^{-(0.25)(∆EN)^2}

SO:  16.9% ionic

ClF:  15.5% ionic

KO:  82% ionic

LiF:  89.5% ionic

 

So, the only one I disagree with you is that I find SO to be more ionic than ClF.  Hope this helps.