5. Provide ALL reasonable resonance structures for each molecular structure below. Note that you need use the curved arrows to show how electrons are moved. Also note that you should not add or erase () the lone pairs. (2.5 pts)

. Hint: Double check your resonance structure does it have the same overall charge (negative one in this case)?

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Hint: Most of time, we have oxygen as neutral or negatively charged, but sometimes.

Hint: Double check your resonance structure does it have any atom that has more than 4 bonds? If so, you need further change(s).

Hint: Double check your resonance structure overall charge is +1, no 5 bonds on any atom, and you did not move any atoms.

6. Assign the formal charges of the heavy atoms (non-hydrogen atoms, so in this case Cs, N, O and P) in the Lewis structure below. Note that you should not add or erase () the lone pairs. (0.9 pt, 0.2 pt for each heteroatom, 0.1 for 3 C atoms)