In which one of the following is the best Lewis structure a resonance structure? A)SO ₃ B)BF ₃ C)I ₃ ⁻ D)SCO (C = central atom) E)SO ₃ ²⁻

Question

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The best Lewis structure for $SO_4^{2-}$ (choice E) involves resonance structures because the double bonds can be placed between the sulfur atom and any of the four oxygen atoms, leading to multiple valid structures that contribute to the overall resonance hybrid.

In Which One of the Following Is the Best Lewis