O=N-O

Explanation:

* Nitrogen (N) is the central atom and has a total of 5 valence electrons.

* Oxygen (O) has 6 valence electrons each.

* Double bond: One oxygen atom forms a double bond with the nitrogen atom.

* Single bond: The other oxygen atom forms a single bond with the nitrogen atom.

* Lone pairs: Each oxygen atom has two lone pairs of electrons.

This structure satisfies the octet rule for all atoms, meaning each atom has 8 electrons in its outermost shell.

It's important to note that the structure is actually a resonance hybrid, meaning the double bond can be represented between either oxygen atom. This gives the molecule a symmetrical structure with a bond order of 1.5 for each N-O bond.