Many more practice questions on the topic of molecular orbital theory can be found on the CHEM 2000 pages of this site. Exercise 22: Delocalized Pi Electrons17 KB Exercise 22: Delocalized Pi Electrons (Answers)19 KB Exercise 111: Resonance Energies37 KB Exercise 111: Resonance Energy (Answers)94 KB Exercise 112: Aromatic, Antiaromatic or Nonaromatic?15 KB Exercise 112: Aromatic vs. Antiaromatic (Answers)68 KB Printer-friendly version