Development of the atomic model

Major phases in the history of theories and views about the structure of the atom.

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We observe whether a razor blade can float on the surface of different liquids.

Mixing substances, separating mixtures 2

Separating mixtures if one of the substances dissolves in water.

Surface tension of liquids 2

In this video we are experimenting with food colourings.

Producing ammonia from nitrogen gas and hydrogen gas

Large-scale ammonia production requires high temperature and pressure and the presence of...

Reaction of zinc with hydrochloric acid

The dissolution of zinc in hydrochloric acid produces hydrogen gas.

Molecule exercise V (Oxo compounds)

An exercise about the groups and structure of oxo compounds.

Covalent bonds in benzene molecules

In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.

Exothermic reaction

When heated, powdered sulphur reacts with powdered zinc, releasing heat.

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