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According to Valence Shell Electron Pair Repulsion (VSEPR) Theory, which of the following best describes a nonbonding electron domain?
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12. Molecular Shapes & Valence Bond Theory
Valence Shell Electron Pair Repulsion Theory
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According to Valence Shell Electron Pair Repulsion (VSEPR) Theory, how many electron groups are present on the central atom (a) in a molecule of CH4?
A
5
B
4
C
3
D
2
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Identify the central atom in the molecule CH4, which is carbon (C).
Recall that electron groups around the central atom include bonded atoms and lone pairs of electrons.
Count the number of atoms directly bonded to the central atom. In CH4, carbon is bonded to 4 hydrogen atoms.
Check for any lone pairs on the central atom. Carbon in CH4 has no lone pairs.
Sum the bonded atoms and lone pairs to find the total number of electron groups: 4 bonded atoms + 0 lone pairs = 4 electron groups.
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