Multiple Choice
Which of the following molecules has a linear molecular geometry?
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12. Molecular Shapes & Valence Bond Theory
Molecular Geometry
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What is the molecular geometry around the carbon atom in methane (CH_4)?
A
Tetrahedral
B
Trigonal planar
C
Linear
D
Bent
Verified step by step guidance1
Identify the central atom in the molecule, which is carbon (C) in methane (CH_4).
Determine the number of electron groups around the central atom. In CH_4, carbon forms four single bonds with hydrogen atoms, so there are four bonding pairs and no lone pairs.
Use the VSEPR (Valence Shell Electron Pair Repulsion) theory to predict the molecular geometry. According to VSEPR, four bonding pairs around a central atom arrange themselves to minimize repulsion, resulting in a tetrahedral shape.
Recall that a tetrahedral geometry has bond angles of approximately 109.5° between the hydrogen atoms.
Conclude that the molecular geometry around the carbon atom in methane (CH_4) is tetrahedral.
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