Iodine crystal

A solid, grey substance which sublimates when heated. Its solution in alcohol is called ´tincture of iodine´, it is a disinfectant.

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Nitrogen (N₂) (basic)

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

Water (H₂O)

Water is a very stable compound of hydrogen and oxygen, vital for all known forms of...

Dangerous plastic

Environmental organisations are against the use of PVC.

Sodium chloride (NaCl)

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

Hydrogen chloride (HCl)

A colourless gas with a pungent odour, its solution in water is called hydrochloric acid.

Silver chloride (AgCl)

A white, crystalline compound that breaks down when affected by light.

How airbags work

A compound called sodium azide is responsible for the operation of airbags.

Sulphur trioxide (SO₃)

One of the oxides of sulphur, forms sulphuric acid with water.

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