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Obtaining and using metals


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Oxidation
gain of oxygen
Reduction
loss of oxygen
Electrolysis
is used to extract metals that are more reactive than carbon
Heating with carbon
is used to extract metals that are less reactive than carbon
Properties of metals
strong, good conductors or heat and electricity
Alloy
a mixture of two or more metals, or a mixture of a metal and a non-metal. They are harder than pure metals because the new element's atoms upset the layer of original atoms making it more difficult to slide over each other
Smart alloys
return to their original shape, e.g. nitiniol used in glasses frames
Advantages of recycling
used less resources, energy, money and makes less rubbish. Also economic benefits