Dimethyl ether (C₂H₆O)

A colourless gas with a typical odour, produced by dehydrating...

Methane hydrate

A solid substance formed at low temperatures on the ocean floors...

Clothing of Barbarians (5th century)

Clothing reflects the lifestyle and culture of the given era and...

Trichloromethane, chloroform (CHCl₃)

Also known as chloroform, used as a solvent in laboratories,...

Ottoman Sultan (16th century)

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

Construction of a panel building

Buildings constructed of prefabricated concrete blocks were...

Silver bromide (AgBr)

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

Carbon dioxide (CO₂) (beginner)

Colourless, odourless, heavier-than-air gas. Necessary for the...

Oxygen (O₂) (beginner)

A colourless, odourless gas, an important component of the...

Carbon monoxide (CO) (beginner)

Colourless, odourless gas, highly toxic to humans and animals in...

Nitrogen (N₂) (basic)

A colourless, odourless, non-reactive gas, it constitutes 78.1% of...

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