Typical Central European flat in the 1950s

Typical Central European flats in the 1950s consisted of a single room, a kitchen and a bathroom.

Yurt

A circular, domed, portable tent covered by felt, typically used by nomadic peoples.

Calvinist College of Debrecen (18th century)

One of the oldest schools in Hungary, where several renowned Hungarians studied.

Pent-1-ene (C₅H₁₀)

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

Sulphate ion (SO₄²⁻)

A compound ion produced when sulphuric acid releases protons.

Ammonia (NH₃)

Ammonia is a colourless gas with a characteristic pungent smell. Its solution in water is called ammonium hydroxide or household ammonia.

Water (H₂O)

Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.

Hydroxide ion (OH⁻)

A compound ion formed when a water molecule releases a proton.

Cellobiose (C₁₂H₂₂O₁₁)

Cellobiose is the basic structural unit of cellulose.

Carbamide (urea) (CO(NH₂)₂)

An organic compound in the urine of mammals, used in the production of fertilisers as a source of nitrogen.

Benzene (C₆H₆)

Benzene is the simplest aromatic hydrocarbon.

Hydronium ion (H₃O⁺)

The presence of hydronium ions relative to hydroxide ions determines a solution´s pH.

Trans-2-butene (C₄H₈)

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

Sulphur (S₈)

An odourless, yellow, solid substance, the 16th most common in the Earth´s crust. One of the best known sulphur compounds is pyrite, also known as ´fool´s...

Nitrate ion (NO₃⁻)

A compound ion, the main source of nitrogen for plants.

Ethane (C₂H₆)

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

Silver nitrate (AgNO₃)

One of the raw materials of traditional photography.

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