Which Molecule Has Three Charge-Minimized Resonance Structures?

[kayleech]

Hi,
I'm having trouble figuring out which of the following molecules can be described using three charge-minimized resonance structures. Does anyone have any idea which molecules this would include?

a. SF4
b. SO3
c. SO32-
d. HSO4-
e. SO2+

 

[AbedeuS]

Suggestion: Use VSEPR to find out their bonding structures, or type their names into Google to save time, from there you should be able to work towards the final answer

 

[kayleech]

I did that and I came up with SO32- being the only answer.

Is that correct or am I doing something wrong?

 

[eli64]

If you are looking for one of your choices to have 3 resonance structures, it would be best to draw the Lewis structures for EACH one a) - e) There is only one (and its not
SO32-) that has 3 resonance structures and the formal charges would be minimized for each resonance of that choice.