Other questions in this quiz

2. Why is Mg (carbonate and nitrate) the least thermally stable of the G2 elements ?

  • Magnesium has the largest nuclear charge so can most easily pull apart the electron cloud
  • Magnesium isn't the least thermally stable, Barium is.
  • Magnesium has the smallest ionic radius as a 2+ cation so a greater polarising ability (more charge dense)
  • Magnesium forms radioactive carbonates and nitrates that are unstable and break down

3. What is disproportionation?

  • When one atom both gains and looses electrons in a reaction
  • The action of a powerful reducing agent
  • When one element undergoes both reduction and oxidation in a reaction at the same time
  • A property of halides which decreases in ability down the group

4. Caesium's flame colour is __(a)___ , Rubidium's is __(b)__ and Magnesium's is __(c)__

  • (a)Red (b) Yellow (c) Green
  • (a) Blue/Violet (b) Red/Purple (c) No colour
  • (a)Orange (b) Brick Red (c) White
  • (a) Apple green (b) Lilac (c) No colour

5. It forms a cream precipitate with silver nitrate solution; it's insoluble in aqueous ammonia but dissolves in concentrated ammonia. It is...

  • NaBr
  • LiF
  • KI
  • MgCl2

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