Multiple Choice
What is the molecular geometry of SF_4?
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12. Molecular Shapes & Valence Bond Theory
Molecular Geometry
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Which of the following best describes the molecular geometry of a CO_2 molecule?
A
Tetrahedral
B
Bent
C
Linear
D
Trigonal planar
Verified step by step guidance1
Identify the central atom in the CO_2 molecule, which is carbon (C).
Determine the number of regions of electron density around the central atom. In CO_2, carbon forms two double bonds with oxygen atoms, so there are two regions of electron density.
Use the VSEPR (Valence Shell Electron Pair Repulsion) theory to predict the molecular geometry. Two regions of electron density around the central atom will arrange themselves as far apart as possible, which is 180° apart.
Recognize that when there are two regions of electron density and no lone pairs on the central atom, the molecular geometry is linear.
Conclude that the molecular geometry of CO_2 is linear, not tetrahedral, bent, or trigonal planar.
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