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Dynamo (basic)

A dynamo converts mechanical energy into direct current.

Szilassi polyhedron

This special concave polyhedron was named after a Hungarian mathematician.

Silver bromide (AgBr)

A white, crystalline compound which breaks down when exposed to light.

Hypochlorite ion (OCl⁻)

Hypochlorite ions are formed when water is disinfected with chlorine.

Amylose ((C₆H₁₀O₅)n)

A helical molecule consisting of alpha-D-glucose units. It is one of the basic components of starch.

Fibroin

Fibroin is a fibrillar protein excreted by silkworms.

Alpha-D-glucose (C₆H₁₂O₆)

Alpha-D-glucose is one of the stereoisomers of glucoses, specifically the D-glucoses.

Sulphuric acid (H₂SO₄)

A colourless, viscous liquid, a highly corrosive, strong acid used in several industrial processes.

Permanganate ion (MnO₄⁻)

Potassium permanganate is used as a disinfectant.

Silver iodide (AgI)

A light yellow compound formed in the reaction of silver nitrate and potassium iodide.

Sodium chloride (NaCl)

Common salt (or table salt) is one of the most important sodium compounds, indispensable for living organisms.

Construction of a panel building

Buildings constructed of prefabricated concrete blocks were widespread in the former Socialist countries.

The water cycle (basic)

Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.

Glyceraldehyde (C₃H₆O₃)

The simplest aldose, an optically active compound.

Comparison of halogens

Halogen elements are a group in the periodic table consisting of five chemically related elements, fluorine, chlorine, bromine, iodine, and astatine.

Comparison of hydrogen halides

Atoms within hydrogen halides are bound by covalent bonds, forming polar molecules.

Alanine (C₃H₇NO₂)

A non-polar amino acid. L and D molecules are mirror images of each other.

Labour camp in Hungary (Recsk)

About 1,500 people were taken to the labour camp also known as ‘the Hungarian Gulag’ during the Rákosi era.

Pyrimidine (C₄H₄N₂)

A heterocyclic organic compound, its derivatives are thymine, cytosine and uracil.

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