Metals

Metals

1. How metals are obtained?

   • In mines,the useful minerals,or ore and the useless minerals or gangueare together and must be separated using differents processes.When the ore is separated ,from the gangue the next step is to make metal from the ore.The ore is taken to an ironworks and undergoes complex physical and chemical processes.

2. Classifying metals

   • Ferrous metals:Their main component ir Iron.
     • Pure Iron
     • Steel
     • Cast Iron
   • Non-ferrous metals:Their main component is not Iron.
     • Types
       • Ultra-light metals
       • Light metals
       • Heavy metals

3. Properties of metals

   • Good electrical,thermal and acoustic conductors
   • There are ductile and malleable
   • Are though
   • Also can be used for welding
   • They expand when the temperature rises and contract when it cools
   • Some are magnetic
   • Most of them rust when they come into contact with air
   • Can be recycled and reused
   • Some are toxic