### Lewis Structure(s)

Posted:

**Sun Nov 04, 2018 4:54 pm**On the exam, what if the question asks for the lewis structure of a structure that has resonance, but one of the structure has lower energy than the other 2 resonance structures?

For example, SO

Technically, there are three resonance structures for SO

However, one of the three structures (the structure with two double bonds) has lower formal charges than the other two resonance structures. So, if we were asked about this structure, should we draw all three resonance structures or just draw the one with the lowest formal charge?

Will the exam always clarify when to draw resonance structures and when to draw only one structure?

For example, SO

_{2}Technically, there are three resonance structures for SO

_{2}However, one of the three structures (the structure with two double bonds) has lower formal charges than the other two resonance structures. So, if we were asked about this structure, should we draw all three resonance structures or just draw the one with the lowest formal charge?

Will the exam always clarify when to draw resonance structures and when to draw only one structure?