In the Lewis structure for FeF3, how many lone pairs surround the iron atom? NEED ASAP
Select one:
a. 0
b. 1
c. 2
d. 3
Clear my choice

b. 1

Explanation:

If we consider it carefully we will notice that the electronic configuration of iron III is; [Ar] 3d5 4s0.

Now, three electrons from the d orbital are paired with the three electrons from three F atoms according to the valence bond theory. This leaves out one pair of electrons localized on the d orbital of iron.

Hence the compound has one lone pair of electrons.