Molecular Shape Sect 9.4

VSEPR Model Valence Shell Electron Pair Repulsion Valence Shell Electron Pair Repulsion Electron pairs will position themselves to minimize repulsion Electron pairs will position themselves to minimize repulsion Vocabulary Vocabulary Central atom Has the least attraction for shared electrons Located in center of molecule Bond angle Angle formed by two terminal atoms and the central atom

Bond Angles Bond angles depend on whether electron pairs are shared or are lone pairs. Bond angles depend on whether electron pairs are shared or are lone pairs. –Lone pairs take up more space than shared pairs, thus pushing shared pairs closer together.

Common Shapes Linear Linear Trigonal planar Trigonal planar Tetrahedral Tetrahedral Trigonal pyramidal Trigonal pyramidal Bent Bent Trigonal bipyramidal Trigonal bipyramidal Octahedral Octahedral

Hybridization A process in which atomic orbitals are mixed to form new, identical hybrid orbitals A process in which atomic orbitals are mixed to form new, identical hybrid orbitals