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Section 3: Electron Configurations
1. What does each small box in the diagram represent?
2. How many electrons can each orbital hold?
3. How many electrons can the d sublevel hold?
4. Which is associated with more energy: a 2s or a 2p orbital?
5. Which is associated with more energy: a 2s or a 3s orbital?
6. According to the aufbau principle, which orbital should fill first, a 4s or a 3d orbital?
7. Which orbital has the least amount of energy?
8. What is the likelihood that an atom contains a 1s orbital?
9. Sequence the following orbitals in the order that they should fill up according to the
aufbau principle: 4d, 4p, 4f, 5s, 6s, 5p, 3d, 4s.