Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. Why are metals such as gold found in the Earth as the metal itself?
   • Gold is found in the Earth as the metal itself as it is unreactive.
2. How can metals less reactive than carbon be extracted from their oxides?
   • Metals less reactive than carbon can be extracted from their oxides by reduction with carbon.
3. What is meant by 'reduction' in terms of oxygen?
   • Reduction involves the loss of oxygen.
4. What substance can be used to extract the lesser reactive metals?
   • Carbon can be used to extract the lesser reactive metals.
5. What type of reaction is it when electrons are transferred from one species to another?
   • When electrons are transferred from one species to another this is called a redox reaction.
6. Identify the species that are oxidised and reduced in the half equations below: Cu2 Mg --> Mg2 Cu
   • The oxidation half equation is: Mg --> Mg2 2e- The reduction half equation is: Cu2 2e- --> Cu