Question

Find the number of super octet molecules of the following SF6, PCl5, IF7, and BrF5​

Answer 1

In PF

5

,SF

6

and H

2

SO

4

, the central atom has more than eight valence electrons hence they exhibit expanded octet. This is possible due to availability of 3d orbitals.

Elements in and beyond the third period of the periodic table do not follow octet rule thus it applies mainly to the second period elements of the periodic table.