Answer:
The resonance structures of SO₃²⁻ are in the picture
Explanation:
Lewis structure is a graphical representation of molecules that shows the electrons and bonds that exist in a particular compound. This representation has been very useful in fields of chemistry as organic and synthetic chemistry.
One appliance for this Lewis structures is the explanation of unreactivity in some compounds with resonance structures. The more resonance structures, the less reactivity.
In the picture you can see the Lewis representation of sulfate ion and their different resonance structures (SO₃²⁻). The global idea is to move electrons from more negative atoms to the less ones but there are no specific rules. To develop the resonance structures it is necessary to practice and practice. Remember: Practice makes perfect.
I hope it helps!
