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A solid, gray substance which sublimates when heated. Its solution in alcohol is called tincture of iodine, it is a disinfectant.
One of the hydrogen halides, a highly aggressive substance - it even attacks glass.
The simplest saturated alcohol. A highly toxic compound, easily confusable with ethanol.
A colorless, heavier-than-air gas, an intermediate in the production of nitric acid.
Synthetic rubber is produced by the polymerisation of isoprene.
Used in the production of beryllium and as a catalyst.
A heterocyclic aromatic organic compound, its derivatives include guanine and adenine.
A liquid with a characteristic unpleasant odor and a low boiling point.
A colorless, heavier-than-air gas. Its geometric isomer is trans-2-butene.
The first member of the homologous series of alkyne hydrocarbons.
A reddish-brown toxic gas, very reactive due to its unpaired electron.
A colorless, toxic gas with the characteristic odor of rotten eggs. It occurs in certain mineral waters and spring waters.
It is also used as a food additive, limescale and rust remover.
The simplest aromatic amine. Its scientific name is phenylamine.
One of the hydrogen halides, it is used for the production of alkyl bromides.
One of the oxides of sulfur, forms sulfuric acid with water.
The sixth member in the homologous series of straight-chain alkanes.
A component of DNA, it contains one less hydroxyl group than β-D-ribose.
As a milestone in the history of aviation, Oszkár Asboth´s first helicopter made its first flight in 1928.
Pit houses were typical dwellings in the Arpad era.
A polymorphic compound, mostly found in the form of quartz.