The first member of the homologous series of alkyne hydrocarbons.
A colourless, heavier-than-air gas. Its geometric isomer is trans-2-butene.
A liquid with a characteristic unpleasant odour and a low boiling point.
Colourless, odourless gas used as a standard in NMR spectroscopy.
The devastating defeat of the Hungarians in the battle against the Mongolians was the result of several bad decisions.
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A solid, crystalline compound.
It is also used as a food additive, limescale and rust remover.
The Avars established a stable empire in the Carpathian Basin between the 6th-8th centuries.
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The Soviet army became a very powerful power broker after WWI, at first due to its size, later due to its arsenal.
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One of the main units of Matthias Corvinus´ Black Army was the infantry.
An aldehyde which is an important raw material and intermediate product in industry.
A heterocyclic aromatic organic compound, its derivatives include guanine and adenine.
Pit houses were typical dwellings in the Arpad era.
The term ´hussar´ refers to a type of light cavalry which originated in Hungary and was the most popular in the 18th–19th centuries.