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2. what is oxidization

  • when objects react in a normal state
  • the loss of electrons
  • reduction of elements

3. which of these is an alloy

  • brass
  • aluminium
  • iron

4. what causes rust

  • gain of electrons
  • water and air
  • acid

5. which is the most reactive: potassium, lithium or sodium

  • potassium
  • lithium
  • sodium
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