VSEPR Valence Shell Electron Pair Repulsion Theory

1. VSEPR Valence Shell Electron Pair Repulsion Theory Determining the Shape of a Molecule

2. VSEPR theory explains and predicts the geometry of molecules by counting pairs of electrons that repel each other to minimize repulsion. STEP 1 - Draw the Lewis structure for the molecule, including the electron pairs around the central atom. STEP 2 - Count the total number of bonding pairs (bonded atoms) and lone pairs of electrons around the central atom STEP 3 - Refer to reference table and use the number of pairs of electrons to predict the shape of the molecule

3. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair) Electron-pair arrangement is in brackets

4. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

5. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

6. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

7. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

8. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

9. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

10. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

11. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

12. Table 1: Using VSEPR Theory to Predict Molecular Shape (A = central atom X = bonding pair E = lone pair)

13. Drawing 3-D Shapes

14. Learning Checkpoint p. 246 Practice UC # 1, 2, 3, 9 Read p. 248 “Multiple Bonding in VSEPR Theory” p. 249 Practice UC # 10, 11 p. 250 Section 4.3 Questions # 1, 2, 3