3 Turn over 2 This question is about ionisation energies. (a) (i) Which equation represents the second ionisation of bromine? (1) A Br(g) + e– → Br–(g) B Br–(g) + e– → Br2–(g) C Br(g) – 2e– → Br2+(g) D Br+(g) – e– → Br2+(g) (ii) Which set of successive ionisation energies is most likely to be associated with the element boron? (1) A    738, 1 451, 7 733, 10 541, 13 629 B    801, 2 427, 3 660, 25 026, 32 828 C 1 086, 2 353, 4 621,   6 223, 37 832 D 1 402, 2 856, 4 578,   7 475,   9 445 4 (b) (i) Complete the graph to show how the first ionisation energies of the Period 3 elements change across the period. Precise figures are not required. (3) First ionisation energies of the Period 3 elements Na 1600 1400 1200 1000 800 600 400 200 0 First ionisation energy / kJ mol–1 Element Mg Al Si P S Cl Ar 5 Turn over (ii) The successive ionisation energies of sodium are shown on the graph. Successive ionisation energies of sodium 0 1 2 3 4 5 6 7 8 9 10 11 5.5 5.0 4.5 4.0 3.5 3.0 2.5 Log ionisation energy Number of electrons removed State what deductions can be made from this graph. (2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (Total for Question 2 = 7 marks)