Red phosphorus

One of the allotropes of phosphorus.

Acetaldehyde (ethanal) (CH₃CHO)

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

Pyridine (C₅H₅N)

A basic heterocyclic organic compound; a colourless, pungent toxic liquid.

Hydrogen bromide (HBr)

One of the hydrogen halides, it is used for the production of alkyl bromides.

Pluto - Charon system

The largest satellite of Pluto is Charon.

Styrene (vinyl benzene) (C₈H₈)

A colourless liquid with an odour similar to benzene. The monomer of polystyrene.

Hydrogen-iodide (HI)

A colourless, heavier-than-air gas with a pungent odour.

Bratislava (18th century, Kingdom of Hungary)

Bratislava (Pozsony) was the capital of the Kingdom of Hungary in the 18th century

Hydrogen peroxide (H₂O₂)

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

Hexane (C₆H₁₄)

The sixth member in the homologous series of straight-chain alkanes.

Hungarian army in the 15th century (infantry)

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

Historical topography (places)

Find notable historical places on a blank map.

Soil types - Hungary (map)

This animation demonstrates the types of soil found in Hungary.

Hungarian settlements of the Arpad era

Pit houses were typical dwellings in the Arpad era.

Hungarian hussar

The term ´hussar´ refers to a type of light cavalry which originated in Hungary and was...

Eurasian Avars (8th century)

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

Molecule exercise II (Polarity)

An exercise about the polarity of molecules.

Historical topography (battles, Hungarian history)

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

Historical topography (locations, Carpathian basin)

Find notable locations of the Carpathian Basin on a map.

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