Hydrogen sulfide (H₂S)

A colorless, toxic gas with the characteristic odor of rotten eggs. It occurs in certain mineral waters and spring waters.

Aniline (C₆H₅NH₂)

The simplest aromatic amine. Its scientific name is phenylamine.

Hydrogen bromide (HBr)

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

Sulfur trioxide (SO₃)

One of the oxides of sulfur, forms sulfuric acid with water.

Nitrogen-dioxide (NO₂)

A reddish-brown toxic gas, very reactive due to its unpaired electron.

Ethyne (acetylene) (C₂H₂)

The first member of the homologous series of alkyne hydrocarbons.

Ethene (ethylene) (C₂H₄)

The first member in the homologous series of 1-alkenes.

Dimethylamine (NH(CH₃)₂)

A colorless gas with a pungent odor. It is widely used in industry.

2,2 dimethylpropane (C₅H₁₂)

Colorless, odorless gas used as a standard in NMR spectroscopy.

Pent-1-ene (C₅H₁₀)

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

Cis-2-butene (C₄H₈)

A colorless, heavier-than-air gas. Its geometric isomer is trans-2-butene.

Hexane (C₆H₁₄)

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

2-deoxy-beta-D-ribose (C₅H₁₀O₄)

A component of DNA, it contains one less hydroxyl group than β-D-ribose.

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.

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

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

Leonardo da Vinci’s inventions - armored car

The design for the armored car features the most important military requirements: reliability, portability and great firepower.

Leonardo da Vinci’s inventions - Flapping wing (1487–1489)

Leonardo based the design of the flapping wing on birds' wings and a faulty hypothesis.

Navigation in space

The animation helps to develop space perception and navigation in space using space coordinates.

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 - Siege engines

Leonardo was not only a master artist, but also an accomplished military engineer.

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