Final answer:
The best Lewis structure that is a resonance structure is SO3^2-.
Step-by-step explanation:
Resonance structure:
In the given options, the best Lewis structure that is a resonance structure is e. SO3^2-.
Step-by-step explanation:
Resonance occurs when there are multiple valid structures that can be drawn for a molecule or ion. In the case of SO3^2-, there are multiple ways to arrange the electrons, resulting in three resonance structures.
Resonance structures for SO3^2-:
1. One structure shows a double bond between sulfur and one oxygen atom, and single bonds to the other two oxygen atoms.
2. Another structure shows a double bond between sulfur and a different oxygen atom, and single bonds to the other two oxygen atoms.
3. The third structure shows a double bond between sulfur and a different oxygen atom, and a coordinate covalent bond with one of the oxygen atoms.
All three resonance structures are valid and contribute to the overall structure of SO3^2-. This means that the true structure of SO3^2- is a combination of these three structures, called a resonance hybrid.