In VSEPR, which of the following is considered a single electron group?
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To determine which of the following is considered a single electron group in VSEPR theory, we first need to understand what an electron group means in this context.
In VSEPR (Valence Shell Electron Pair Repulsion) theory, electron groups are regions in molecules or ions where there are lone pairs of electrons or bonds. These electron groups, in turn, influence the molecular geometry and bond angles.
Now, let's look at the options provided and identify the single electron group.
Option A: A lone pair of electrons on an atom. This would be considered a single electron group since it is a region with one pair of electrons that is not involved in bonding.
Option B: A double bond between two atoms. This would be considered as two electron groups because a double bond consists of two pairs of electrons.
Option C: A triple bond between two atoms. Similar to option B, a triple bond is considered as three electron groups since it consists of three pairs of electrons.
Option D: A single bond between two atoms. A single bond is also considered as one electron group since it consists of only one pair of electrons.
Therefore, the single electron group among the options provided is option D, a single bond between two atoms.