One of the oxides of sulphur, forms sulphuric acid with water.
One of the raw materials of traditional photography.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
A colourless, heavier-than-air gas with a pungent odour.
A compound formed as white smoke during the combustion of phosphorus.
Colourless, heavier-than-air gas with a pungent odour. It forms white fumes in moist air.
Glass items are an integral part of everyday life. But how are they made?
A compound ion generated when a proton is added to an ammonia molecule.