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3 marksGroup II Elements

CAPE Chemistry Unit 1 · 2011 · Paper 2 · Question 3(c)(ii)

Radium, Ra, is the last member of the Group II elements.

Write the balanced equation for the thermal decomposition of the nitrate of radium, Ra(NO3)2.

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Other parts of this question

  1. 3(a)Write the ionic equation of such an element, M, to show the formation of the ion present.[1 mark]
  2. 3(b)Use the information in Table 1 to account for the differences in reactivity of the elements shown.[3 marks]
  3. 3(c)(i)Comment on the solubility of the sulphate of radium in water.[1 mark]
  4. 3(d)(i)State the steps that should be taken in the investigation of the differences in solubility of the sulphates of magnesium, calcium and barium.[3 marks]
  5. 3(d)(ii)List the names of the reagents that may be used in the investigation.[2 marks]
  6. 3(e)List THREE uses of calcium carbonate.[3 marks]

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