Question

1. Draw a 3-D Lewis structure of the following and what is the formal charge of the central atom;

a. I3+

b. NF3

c. POBr3

Answer 1

a) total number of valance electrons in I3+

= 3(I) -1

= 3(7) -1

= 20

B) total number of valance electrons in NF3

= N+3(F)

= 5+3(7)

= 26

c) total number of valance electrons in POBr3

= P + O + 3(Br)

= 5+6+3(7)

= 32

The 3-D Lewis structures are as follows:

In I3+ formal charge on central atom is +1.

In NF3 formal charge on central atom is 0.

In POBr3 formal charge on central atom is 0