METALS

METALS

1. How metals are obtained?

   • In mines, the useful minerals, or ore, and the useless minerals, or gangue are together and must be separated using different physical processes

2. Classyfing metals

   • Ferrous metals
     • Pure iron
     • Steel
     • Cast iron
   • Non-ferrous metals
     • Ultra.light
     • Light metal
     • Heavy metals

3. Propierties of metals

   • good electrical, thermal and acoustic conductors
   • ductile and malleable
   • are tough
   • melt at high temperatures so they can also be used for welding
   • expand when the temperature rises and contract when it cools
   • Some are magnetic
   • are toxic for the environment
   • can be recycled and reused
   • ust when they come into contact with air and oxygen