According to Valence Shell Electron Pair Repulsion (VSEPR) Theory, which of the following is considered an electron group around a central atom?

• A. Only double and triple bonds
• B. A single bond, a double bond, a triple bond, or a lone pair of electrons
• C. Only single bonds between atoms
• D. Only lone pairs of electrons

Answer: (B)

Verified step by step guidance

1. Understand that according to VSEPR theory, an electron group is any region of electron density around the central atom that can repel other electron groups.
2. Recognize that electron groups include single bonds, double bonds, triple bonds, and lone pairs of electrons because all these represent areas where electrons are localized.
3. Recall that multiple bonds (double or triple) count as one electron group each, not multiple groups, since they occupy one region of space around the central atom.
4. Note that lone pairs are also considered electron groups because they occupy space and influence molecular geometry by repelling bonding pairs.
5. Conclude that the correct classification of electron groups includes single bonds, double bonds, triple bonds, and lone pairs of electrons around the central atom.