1. What does wave mechanics substitute for the circular orbits of the Bohr theory?

2. What is meant when a picture of an orbital is described as an "electron probability cloud"?

3. What quantum numbers are needed to describe the state of an electron in wave mechanics?

4. How do the possible values of quantum number I depend on n?

5. How do the possible values of quantum number m depend on l?

6. Which quantum number is most closely associated with the size of the orbital?

7. Which quantum number is most closely associated with the shape of the orbital?

8. What property is associated with quantum number m?

9. How do the , and orbitals differ? Sketch them.