4.1.3 Extraction of Metals & Reduction

• Unreactive metals e.g gold are found where as what?

  In the Earth as the metal itself.
• A more reactive element will displace what from its compound?

  A less reactive element.
• What is a reduction reaction?

  A reaction that separates a metal from its oxide.
• What do metals often have to be separated from?

  Their oxides, which are often ores.
• What can metals less reactive than carbon be extracted by?

  Reduction with carbon.
• Why can reduction with carbon only be used to extract metals below carbon in the reactivity series?

  Carbon can only take the oxygen away from metals which are less reactive than carbon itself is.
• What are most metals found as and what do they require to be extracted?

  Compounds and chemical reactions.
• What does reduction involve?

  The loss of oxygen.