Trichloromethane, chloroform (CHCl₃)

Also known as chloroform, used as a solvent in laboratories, earlier as an anaesthetic.

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.

Clothing (Western Europe, 10-12th century)

Clothing reflects the lifestyle and culture of the region's inhabitants.

Oxygen (O₂) (beginner)

A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.

Nitrogen (N₂) (basic)

A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.

Carbon dioxide (CO₂) (beginner)

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

Carbon monoxide (CO) (beginner)

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

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