Nitrogen dioxide
= Nitrogen dioxide
{title2=$\mathrm{NO_2}$}
The atmospheric <nitrogen> oxide $\mathrm{NO_2}$. Daylight <photodissociation> forms <nitrogen monoxide> and an <oxygen> atom; subsequent <third-body recombination> with <oxygen> forms <ozone>. Whether this makes net <ozone> depends on the pathway that regenerated <nitrogen dioxide>.