Question

when the central atom has one or more lone pairs, the molecular geometry is different from the electron - pair geometry. for example, the table in figure 4.19 indicates that a central atom a surrounded by four regions of electron density will have a____ geometry when a has one lone pair of electrons. trigonal pyramidal bent linear trigonal planar tetrahedral question 17 1 pts using vsepr theory it is predicted that the electron - pair geometry and molecular structure of co₂ are both____. tetrahedral bent trigonal pyramidal trigonal planar linear

Explanation:

1. For the first question, when a central atom A is surrounded by four regions of electron - density and has one lone pair of electrons, according to VSEPR theory, the molecular geometry is trigonal pyramidal. The four electron - density regions would have a tetrahedral electron - pair geometry, but the lone pair repels the bonding pairs, resulting in a trigonal pyramidal shape.
2. For the second question, in CO₂, the central carbon atom has two double - bonds and no lone pairs. According to VSEPR theory, the electron - pair geometry and molecular structure are both linear as the two regions of electron density (the two double - bonds) are arranged to minimize repulsion, with a bond angle of 180°.

Answer:

1. A. trigonal pyramidal
2. E. linear