When asked to give an example of resonance structures, a...

When asked to give an example of resonance structures, a student drew these Lewis structures. Why is this example incorrect?
$$
: \ddot{\mathrm{N}}=\mathrm{N}-\ddot{\mathrm{O}}: \quad \longleftrightarrow \quad: \ddot{\mathrm{N}}-\mathrm{O}-\ddot{\mathrm{N}}
$$

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Key Concepts

Resonance Structures

Resonance structures are different representations of the same molecule that illustrate the possible distributions of electrons. Importantly, all resonance forms must share the same connectivity; they differ only in the placements of electrons (such as in pi bonds or lone pairs) and formal charges, rather than in the positions of the atoms themselves.

Lewis Structures

Lewis structures are diagrams that show how atoms in a molecule are bonded together through the depiction of electron pairs. They are used to represent valence electrons and are driven by rules like the octet rule, enabling predictions about bonding and molecular geometry.

Molecular Connectivity

Molecular connectivity refers to the specific pattern by which atoms are linked together in a molecule. In the context of resonance, any valid resonance structure must maintain the identical framework of bonds and atom arrangements; changes to connectivity indicate a different molecule rather than a resonance form.

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