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4 marksFirst Row Transition Elements

CAPE Chemistry Unit 1 · 2021 · Paper 2 · Question 3(a)(ii)

Table 2 provides information on first ionization energy, atomic radii, electronic structure and oxidation state for Group II elements and first row transition elements.

Explain the difference between the trend of the first ionization energy for the Group II elements and the first row transition elements.

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Other parts of this question

  1. 3(a)(i)Complete Table 2 by inserting the missing electronic structure (ES) and the oxidation state (OS) for EACH element listed.[5 marks]
  2. 3(b)(i)Account for the difference in oxidation state between vanadium and calcium.[4 marks]
  3. 3(b)(ii)Comment on the observation that calcium carbonate is more thermally stable than magnesium carbonate.[2 marks]
  4. 3(c)(i)Explain the observation in terms of the stability constant of the complex ion formed.[3 marks]
  5. 3(c)(ii)Write a balanced equation for the reaction occurring when concentrated HCl is added to a pink solution of cobalt(II) chloride.[2 marks]
  6. 3(d)(i)Complete Table 3 to show the observations expected for EACH of the tests on ammonium vanadate.[5 marks]
  7. 3(d)(ii)Write the formula of the species formed which is responsible for EACH colour observed in (d)(i) in Table 3.[5 marks]

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