Fluorine (F₂)

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

Silver nitrate (AgNO₃)

One of the raw materials of traditional photography.

Glycylglycine (C₄H₈N₂O₃)

The simplest peptide, formed from two glycine molecules by a peptide bond.

Phosphate ion (PO₄³⁻)

A compound ion formed when a phosphoric acid molecule releases a proton.

Lake steamer (1846)

The first paddle steamer in Hungary entered service in 1846.

Oleic acid (cis-octadec-9-enoic acid) (C₁₇H₃₃COOH)

An unsaturated monocarboxylic acid. The molecule contains double bond in cis orientation.

Leonardo da Vinci’s inventions – Swing bridge (1487–1489)

Leonardo's creative legacy also includes several projects related to bridges. This unusual swing bridge allowed for undisturbed water traffic.

Leonardo da Vinci’s inventions - Mechanical wing (1493–1495)

The mechanical wing is one of the masterpieces among Leonardo's sketches related to aviation.

Beryllium dichloride (BeCl₂)

Used in the production of beryllium and as a catalyst.

Leonardo da Vinci’s inventions – Aerial screw (around 1489)

The polymath thought that if a screw-like structure can rotate fast enough, it will 'drill' into the air and fly.

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.

Ammonia (NH₃)

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

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...

Phenol (C₆H₅OH)

The simplest of the aromatic hydroxy compounds.

Bromofluorochloromethane (CHClBrF)

The molecule has two enantiomers: stereoisomers that are mirror images of each other and are not superimposable.

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