Question

electron - pair geometry are based on the number of regions of electron density. match the number of electron pairs to the electron - pair geometry according to the table in figure 4.19. number of electron pairs electron pair geometries 2 pair choose 3 pair choose tetrahedral linear trigonal planar 4 pair choose

Explanation:

In molecular geometry, when there are 2 electron - pairs, they arrange themselves to be as far apart as possible in a straight line, resulting in a linear geometry. When there are 3 electron - pairs, they spread out in a plane to form a trigonal planar geometry to minimize repulsion. When there are 4 electron - pairs, they adopt a tetrahedral geometry to keep the electron - pairs at maximum distance from each other.

Answer:

2 pair: linear
3 pair: trigonal planar
4 pair: tetrahedral