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Decomposition of ammonium dichromate by heating.
One of the hydrogen halides, a highly aggressive substance - it even attacks glass.
When two substances are heated, they combine to form a compound.
The least tightly packed crystal structure.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
Limestone is a widely and diversely used material.
A compound ion produced when sulphuric acid releases a proton.
A compound formed as white smoke during the combustion of phosphorus.