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Hydrogen peroxide (H₂O₂)

The compound of hydrogen and oxygen. Colourless, odourless liquid; heavier than water.

Molecule exercise VII (Organic nitrogen compounds)

An exercise about the groups and structure of organic nitrogen compounds.

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.

Purine (C₅H₄N₄)

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

Aniline (C₆H₅NH₂)

The simplest aromatic amine. Its scientific name is phenylamine.

Ancient Athenian citizen with his wife

The Athenian democracy was built on the community of citizens with full rights.

Lake steamer (1846)

The first paddle steamer in Hungary entered service in 1846.

Phosphorus trichloride (PCl₃)

Colourless liquid that gives off smoke in moist air.

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.

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