2-methylbutane (C₅H₁₂)

One of the isomers of pentane, used as a solvent.

Permanganate ion (MnO₄⁻)

Potassium permanganate is used as a disinfectant.

Arginine

One of the twenty protein-building amino acids.

Glutamine

One of the 20 amino acids that make up proteins.

Valine

One of the 20 amino acids that make up proteins.

Aspartic acid

One of the twenty protein-building amino acids.

Phenylalanine

One of the 20 amino acids that make up proteins.

Hungarian hussar

The term ´hussar´ refers to a type of light cavalry which originated in Hungary and was...

Leucine

One of the 20 amino acids that make up proteins.

Sodium chloride (NaCl)

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

Nitrogen (N₂) (basic)

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

Oxygen (O₂) (beginner)

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

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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