Ethyne (acetylene) (C₂H₂)

The first member of the homologous series of alkyne hydrocarbons.

Cis-2-butene (C₄H₈)

A colourless, heavier-than-air gas. Its geometric isomer is trans-2-butene.

Pent-1-ene (C₅H₁₀)

A liquid with a characteristic unpleasant odour and a low boiling point.

2,2 dimethylpropane (C₅H₁₂)

Colourless, odourless gas used as a standard in NMR spectroscopy.

Battle of Muhi (11–12 April 1241)

The devastating defeat of the Hungarians in the battle against the Mongolians was the result of several bad decisions.

Phosphoric acid (H₃PO₄)

It is also used as a food additive, limescale and rust remover.

Eurasian Avars (8th century)

The Avars established a stable empire in the Carpathian Basin between the 6th-8th centuries.

Soviet soldier (World War II)

The Soviet army became a very powerful power broker after WWI, at first due to its size, later due to its arsenal.

Historical topography (battles, Hungarian history)

Place the sites of notable battles in Hungarian history on a blank map.

Hungarian army in the 15th century (infantry)

One of the main units of Matthias Corvinus´ Black Army was the infantry.

Acetaldehyde (ethanal) (CH₃CHO)

An aldehyde which is an important raw material and intermediate product in industry.

Purine (C₅H₄N₄)

A heterocyclic aromatic organic compound, its derivatives include guanine and adenine.

Hungarian hussar

The term ´hussar´ refers to a type of light cavalry which originated in Hungary and was the most popular in the 18th–19th centuries.

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