Scelta multipla
According to VSEPR theory, which of the following species has all its atoms lying in the same plane?
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12. Molecular Shapes & Valence Bond Theory
Valence Shell Electron Pair Repulsion Theory
Scelta multipla
According to the Valence Shell Electron Pair Repulsion (VSEPR) Theory, how many electron groups are around the central atom in the molecule OF2?
A
4
B
3
C
2
D
5
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Identify the central atom in the molecule OF2. In this case, the central atom is oxygen (O).
Determine the number of valence electrons for the central atom, oxygen. Oxygen has 6 valence electrons.
Consider the bonding in the molecule. Oxygen forms two single bonds with two fluorine atoms, using 2 of its valence electrons for each bond.
Calculate the number of lone pairs on the central atom. After forming two bonds, oxygen has 4 remaining valence electrons, which form 2 lone pairs.
Count the total number of electron groups around the central atom. Each bond and each lone pair counts as one electron group. Therefore, there are 2 bonds and 2 lone pairs, totaling 4 electron groups around the central atom.
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