Electrolysis is often used to give metal objects a decorative coating. This is known as electroplating.

 1.55 Using electrolysis Electrolysis happens when an electric current is passed through an ionic compound which has been melted or dissolved.&nb...

Solid, liquid or gas?

 1.1 Introducing the states Matter can exist in one of three fundamental states: Solid, Liquid or Gas Here we consider the way in which these thr...

Fireworks get their colours from the metal cations in them

 2.45 - 2.46 Up in flames Fireworks produce a whole range of different colours. All fireworks release energy in the form of heat energy and are t...

More than 75% of the elements in the periodic table are metals. Metals are extremely useful materials with a wide variety of uses. This is d...

Flame colours can help to identify the metal ion in a compound

Flame tests can be used to identify some metal ions (cations).Lithium, sodium, potassium, calcium and copper compounds producedistinctive colours in fl...

Rust forms on iron and steel as a result of a redox reaction between iron and oxygen.

 2.15 - 2.20 Loss and gain Oxidation and reduction reactions are very commonplace. When a element combines with oxygen that element is said to ha...

If a nucleus was the size of a raisin, the rest of the atom would be the size of a sports stadium

 Atomic models Atoms are the building blocks of matter. Atoms are the smallest possible particles into which an element can be subdivided, withou...