How airbags work

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

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Comparison of hydrogen halides

Atoms within hydrogen halides are bound by covalent bonds, forming polar molecules.

The reaction between aluminium and bromine

The halogens and the metals combine to produce bromides.

Sulphur (S₈)

An odourless, yellow, solid substance, the 16th most common in the Earth´s crust. One of the...

Permanganate ion (MnO₄⁻)

Potassium permanganate is used as a disinfectant.

Metals

Metal atoms form a regular lattice structure.

Physical and chemical changes The reaction between iron and sulphur (observation)

When two substances are heated, they combine to form a compound.

Chlorine (Cl₂)

A yellow-green toxic gas with a strong odour, one of the halogens.

Red phosphorus

One of the allotropes of phosphorus.

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