question_answer

The structure of \[\text{I}{{\text{F}}_{\text{7}}}\] is

A)  pentagonal bipyramid 

B)  square pyramid

C)  trigonal bipyramid   

D)  octahedral

Correct Answer: A

Solution :

There are 56 = ( = 7 + 7 x 7) valence electrons in 1F7. There with be 7 pairs of electrons around 1. These will be oriented in the directions of pentagonal bi pyramid as shown in the following structure.