One of the raw materials of traditional photography.
One of the oxoacids of nitrogen. A colourless compound with a pungent odour, a strong oxidant.
Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of various compounds.
A compound ion generated when a proton is added to an ammonia molecule.
A colourless, heavier-than-air gas, an intermediate in the production of nitric acid.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
A reddish-brown toxic gas, very reactive due to its unpaired electron.
An exercise about compound ions.
One of the oxoacids of nitrogen. Colourless, moderate acid with a pungent odour, that exists only in aqueous solution.
Potassium permanganate is used as a disinfectant.