Review Central atoms with Expanded Valence Shells: Number of Electron- Electron Pair Bonding Nonbonding Molecular Pairs Geometry Palrs Palrs Geometry Example 6 pairs 6 0 Octahedral 八面体○ctahedral 八面体 5 1 B B 90° 四角锥型 Square pyramidal B 4 2 90° B Square 平面四方形 planarCentral atoms with Expanded Valence Shells: 八面体 Review 八面体 四角锥型 平面四方形