Bromine (Br₂)

One of the halogens, it may cause skin irritation.

Propane (C₃H₈)

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

Maltose (malt sugar) (C₁₂H₂₂O₁₁)

A disaccharide formed by the joining of two alpha-D-glucose molecules.

Fluorine (F₂)

The lightest halogen, a pale yellow-green, toxic gas, extremely reactive. Its best known compound is teflon.

Beta-D-ribose (C₅H₁₀O₅)

A crystalline compound found in nucleic acids, coenzymes, nucleotides and nucleosides.

Cyclohexane (C₆H₁₂)

A colourless liquid, easily solved by organic solvents but not by water.

Building shapes (one colour)

Build 3D shapes from unit cubes with the help of several views.

Karst region (basic)

Karst formations include dolines and dripstones.

Political and economic unions

Several political and economic unions have been formed between countries during the past decades.

Ottoman Sultan (16th century)

The leader of the Ottoman Empire was the Sultan, the lord of life and death.

Rococo castle (Fertőd, Hungary)

The palace and park complex is Hungary´s grandest Rococo edifice, often called the ´Hungarian Versailles´.

Tyrosine

One of the 20 amino acids that make up proteins. It contains an aromatic ring as part of its side chain.

Histidine

One of the 20 amino acids that make up proteins.

Threonine

One of the 20 amino acids that make up proteins.

Serine

One of the 20 amino acids that make up proteins.

Methyl formate (C₂H₄O₂)

The ester of formic acid and methanol, an aroma compound found in certain fruits.

Proline

One of the 20 amino acids that make up proteins. Its amino group and the 3rd carbon atom of the side chain form a ring.

Isoleucine

One of the 20 amino acids that make up proteins.

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