Practice!

Sample Problem

What are all the bond angles in the seesaw arrangement as predicted by VSEPR theory? Select all that apply.

90°

107.5°

109.5°

120°

180°

Solution

Seesaw is virtually a trigonal bipyramidal arrangement where one of the equatorial atoms is replaced by an electron pair. The bond angles are 90°, 120°, and 180°.