1. Which of the following would you expect to have the strongest covalent bonds? A) CO B) FBr C) NF3 D) NaCl 2. Which atomic orbitals overlap to form the NH bonding molecular orbitals of diimide, HN=NH ? N: H: 3. EDCI is a reagent commonly used to synthesize proteins in the lab. Determine the hybridization and molecular geometry around the indicated atoms in EDCI. 4. How many sigma and pi bonds are present in the following anion? Sigma: Pi: 5. a. Serotonin, shown below, is one of the most important neurotransmitters in mammals and other organisms. For serotonin, show the partial charges on all polar covalent bonds by using + and . b. Is serotonin polar? (Yes/No)