METALS

METALS

1. How metals are obtained

   • Mining is carre out in surface mines if the minerals are close to the surface, or in undergruond mines
     • In mines, the useful minerals, or ore, and the useless minerals, or gangue are together and must be separated using differents physical process: -Ironwork -Metallurgy

2. Classifying metals

   • -Ferrous metals: Their main component is ron.(They include pure iron, steel and cast iron)
     • -Non-ferrous:Their main component is not ron- or they contain very little of this group:(copper, bronze, aluminium and zinc)

3. Properties of metals

   • They are good electrian, thermal and acoustic conductors
     • -They are ductile and malleable -They are tough -They melt at high temperatures so they can also be used for welding and more