nitriittiion
Nitriittiion is the chemical species with the formula NO2-. It consists of one nitrogen atom covalently bonded to two oxygen atoms, with a net charge of -1. The nitrite ion is a linear molecule with resonance structures that contribute to its overall stability. It is an important species in various chemical and biological processes.
In chemistry, nitrite is often encountered as a salt, such as sodium nitrite (NaNO2) or potassium nitrite
Biologically, the nitrite ion plays a role in the nitrogen cycle, particularly in nitrification and denitrification