Nitric Oxide Molecule, NO, sitting on a surface.
Nitric Oxide, NO, N=O, One atom of nitrogen (blue) bonded to one atom of oxygen (red). Nitrogen monoxide. An important biological molecule and free radical. Being tested for efficiency against the novel coronavirus, SARS-CoV-2 (COVID-19). The solid internal spheres represent the covalent radii, while the outer surface represents the Van der Waals surface.