Multiple Choice
Which of the following best describes the molecular geometry of ozone (O3)?
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12. Molecular Shapes & Valence Bond Theory
Molecular Geometry
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Which of the following molecular geometries best represents the predicted shape of a molecule of H_2S?
A
Bent (angular)
B
Tetrahedral
C
Linear
D
Trigonal planar
Verified step by step guidance1
Identify the central atom in the molecule H\_2S, which is sulfur (S).
Determine the number of valence electrons around the central atom. Sulfur has 6 valence electrons, and each hydrogen contributes 1 electron, for a total of 8 electrons to consider.
Use the VSEPR (Valence Shell Electron Pair Repulsion) theory to predict the shape: sulfur forms two single bonds with hydrogen atoms and has two lone pairs of electrons remaining.
Recognize that the electron pairs (bonding and lone pairs) arrange themselves to minimize repulsion, resulting in a tetrahedral electron geometry.
Since two positions are occupied by lone pairs, the molecular geometry (shape) is 'bent' or 'angular', not tetrahedral, linear, or trigonal planar.
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