Distinguish electron-domain geometry from molecular geometry
Understand how lone pairs distort ideal bond angles
Identify common geometries: linear, trigonal planar, tetrahedral, etc.
VSEPR Rules
• Electron domains (bonds + lone pairs) repel each other
• They arrange to maximize separation
• Lone pairs occupy more space than bonding pairs
• Molecular geometry considers only atom positions
Why It Matters
Molecular geometry determines polarity, reactivity, and physical properties. VSEPR is the most intuitive way to predict 3D shapes of molecules — essential for understanding intermolecular forces, solubility, and biological function.