Question

multiple choice question
which is the model used to determine molecular shape that is based on an arrangement that minimizes the repulsion of shared and unshared electron pairs around the central atom?

○ molecular formula
○ resonance model
○ vsepr model
○ lewis structure

Explanation:

• Molecular formula shows the number of atoms, not molecular shape determination.
• Resonance model deals with electron delocalization in structures, not shape via electron pair repulsion.
• VSEPR (Valence Shell Electron Pair Repulsion) model is based on minimizing repulsion of electron pairs (shared and unshared) around the central atom to determine molecular shape.
• Lewis structure shows bonding and lone pairs but not the 3D shape determination via repulsion minimization.

Answer:

C. VSEPR model