Since it's a single molecule, it's already a balanced chemical formula. You don't need to write a symbol equation for it.

Note: You might be thinking of the formation of nitric oxide, which can be represented by the following balanced equation:

N₂ + O₂ → 2NO

This equation shows that one molecule of nitrogen gas (N₂) reacts with one molecule of oxygen gas (O₂) to produce two molecules of nitric oxide (NO).