Edexcel Jun 2015 Paper 5 Q21

Answers available below

SECTION B Answer ALL the questions. Write your answers in the spaces provided. 21 (a) The table below shows the first and second ionization energies of nickel, copper and zinc. Element 1st ionization energy / kJ mol1 2nd ionization energy / kJ mol1 Ni Cu Zn 737 746 906 1753 1958 1733 (i) Complete the electronic configurations for an atom of nickel and an atom of copper. (2) Ni: 1s2 2s2 2p6Cu: 1s2 2s2 2p6*(ii) The values for the first ionization energies of copper and nickel are similar, but the values of the second ionization energies are significantly different. Explain how these data give evidence for the electronic configuration of a copper atom. (2)*P45073RA0828*<br /> (iii) Suggest why you might expect the third ionization energies of the three elements to increase from nickel to zinc. (1)(b) (i) Cu+(aq) ions are not stable in solution and undergo a disproportionation reaction. Suggest an equation for this reaction, including state symbols. (ii) Suggest in what way the appearance of CuI is similar to that of ZnI2. Give a reason for this similarity. (1) (2)(c) Explain why zinc is not classified as a transition element. (1)(Total for Question 21 = 9 marks) *P45073RA0928* Turn over<br />

Show answer