Chapter 9, Problem 9STP

Interpretation Introduction

Interpretation:

The name for the multiple Lewis structures given in the diagram needs to be determined.

Concept introduction:

Resonance is a condition that arises when a molecule or ion may write to more than one valid Lewis structure. The two or more right Lewis structures reflect a single molecule, or ions, is called the molecule or ion 's resonance structures.

Answer to Problem 9STP

The name of the multiple Lewis structures is ${\text{NO}}_3{}^{-}$ (nitrate).

Explanation of Solution

The structure given in the diagram shows the delocalization of electrons of ${\text{NO}}_3{}^{-}$ ion. When a molecule or polyatomic ion possesses both a double bond and a single bond it is probable to have more than one Lewis structure.

Conclusion

Resonance structures vary only in the position of the pairs of electrons, never the position of the atoms.