The nitrate ion NO3- has three resonance structures. In each resonance structure, the nitrogen atom is at the center, and the three oxygen atoms are surrounding it. The nitrogen atom has a positive charge, and one of the oxygen atoms has a negative charge in each structure. The other two oxygen atoms have a double bond with the nitrogen atom. The three resonance structures can be represented as follows:1. O=N-O - -O2. O - -N=O-O3. O-O - -N=OIn these structures, the negative charge is distributed among the three oxygen atoms, and the positive charge is on the nitrogen atom.The resonance hybrid structure of the nitrate ion is a blend of these three resonance structures. In the hybrid structure, the nitrogen atom is at the center, and the three oxygen atoms are surrounding it. Each N-O bond is a partial double bond, and the negative charge is distributed equally among the three oxygen atoms. The hybrid structure can be represented as:O - -N + -O - | O - Here, the symbol "" represents a partial charge. The resonance hybrid structure shows that the nitrate ion has a delocalized negative charge and equal bond lengths for all three N-O bonds.