One of the oxoacids of nitrogen. A colourless compound with a pungent odour, a strong oxidant.
A compound ion, the main source of nitrogen for plants.
A colourless, heavier-than-air gas, an intermediate in the production of nitric acid.
Colourless, odourless liquid produced by dissolving carbon dioxide in water.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
A colourless, viscous liquid, a highly corrosive, strong acid used in several industrial processes.
Colourless, moderate acid, only known in aqueous solution.