| Predicting molecular shape General rules for some simple molecules. | ||
| 
 | ||
| Electron 
        pairs   | Formula | Shape | 
| 2 | AB2 |  Linear | 
| 3 | AB3 | 
 
 Triangular planar | 
| 3 | AB2 | 
 
 
 | 
| 4 | AB4 | 
 
 
 | 
| 4 | AB3 | 
 
 
 | 
| 4 | AB2 | 
 
 
 | 
| 6 | AB6 |  Octahedral | 
| 6 | AB4 |  Square planar |