Metales and plastics

Metales and plastics

1. What are metals?

   • Chemical elements are organised in the periódico tablet, theresa divided into two diferente groups: metals and non metals
     • Im going to say some of them: iron,cooper,silver,tin,gold,mercury and leaf
   • The general properties of metals are: they are good heath and electricity conductors , they reflect light ,all metals exceptuando mercury, are sólido st broom temprature
   • Obtainig metals :mineral extracción,separating the ore and gangue to obtain metals and transforming the ingots into useful pieces
   • Environmental impact: mining spoils the landscape,it alters the soil structure and blasting

2. Plastics

   • A polymer is a large molecule created as result of the binding accumulation and repetition of structual units called monomers
   • Polymers and monomers join together thai procesa is calles polymerisation
   • Plastics are categorised as:thermoplastis,thermosetting polymers and elastomers