Unit three

Unit three

1. Extraction of metals

   • heat alone
     • unreactive metals found uncombined in the Earth's crust
       • silver and gold
   • heat with carbon
   • electrolysis

2. Properties and uses of metals

   • high melting point
     • conducts heat and electricity
       • ductile
         • malleable
   • electrical wiring
     • pots and pans
       • cutlery
         • construction

3. Nuclear chemistry

   • alpha
   • beta
   • gamma
   • background radiation
   • nuclear equations
   • applications
   • half-life

4. chemical analysis

5. Plastics

6. fertilisers

   • essential elements are nitrogen, phosphorus and potassium (NPK)
   • Haber process
   • Otswald process