Explain important aspects of resonance with reference to the C${{O}_{3}}^{2-}$ ion

cbse
chemicalbonding

#1

According to the experimental findings, all carbon to oxygen bonds in C${{O}_{3}}^{2-}$ are equivalent which is due to resonance.
Therefore, the carbonate ion is best described as resonance hybrid of the canonical forms I, II, and III shown below :