CHEM 342. Spring 2002.  Next PS   Previous PS  Answers  PS#5.doc (Word97)  

Note: Relevant Chapters in Mortimer are Chapters 17 and 18.

1. What is the main assumption of the Born-Oppenheimer approximation?

2. Using the Born-Oppenheimer approximation, write the Hamiltonian for the H₂ molecule (2 electrons).

3. Determine the energy for in terms of H_aa, H_ab, and S using the variation method.

4. Show that the sp² hybrid orbital is normalized if the s and p orbitals are also normalized.

5. What are the electron configurations for     ?

6. Which of the following transitions are allowed in the normal electronic emission spectrum of an atom

1. 2s to 1s
2. 2p to 1s
3. 3d to 2p

7. Write the electronic configurations for N₂, N₂⁺, N₂^-.

8. Determine the complete term symbol for each of the following electronic configurations

9. Write the electronic configuration for Li₂, and predict the term symbol for the ground level.

10. Which of the following electronic transitions are allowed?

11. The ground-level term for a heteronuclear diatomic molecule is . Write the term symbols of the electronic transitions allowed for this molecule.

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