TABLE 9.1 Electron-Domain Geometriesas a Function of the Number of of Electron Domains Number of Arrangement of Electron-Domain Predicted Electron Domains Electron Domains Geometry Bond Angles 2 Linear 180° 3 Trigonal 120° planar both bonding and 4 Tetrahedral 109.5° nonbonding electron pairs 5 Trigonal- 120° bipyramidal 90° 6 Octahed ral 90° 180°both bonding and nonbonding electron pairs