A bit of Chem stuff...

Hahahs. Sorry for the... study-related post. But just wanna save everyone in the class, including myself. So... I spent 2 seconds to look this up and a few more seconds to pick up main points =)

Hint hint from chem class...

1. Resonance hybrids are always more stable than any of the canonical structures would be, if they (canonical structures) existed.
2. The delocalisation of the electrons lowers the orbital energies, imparting this stability.
3. The gain in stability of the resonance hybrid over the most stable of the (non-existent) canonical structures is called the resonance energy.
4. Resonance energy, and consequently stability, increase with the number of canonical structures possible, especially when these (non-existent) structures are equal in energy.

If you want to read more, go to
http://en.wikipedia.org/wiki/Resonance_structure
Alvin's favourite site! LOL

Next post will be fun stuff!