CIE Jun 2014 v1 Paper 2 Q1

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Answer all the questions in the spaces provided. PMT (a) Explain what is meant by the term ionisation energy.[3] (b) Therst seven ionisation energies of an element, A, in kJ mol1, are 1012 1903 2912 4957 6274 21 269 25 398. (i) State the group of the Periodic Table to which A is most likely to belong. Explain your answer.[2] (ii) Complete the electronic con guration of the element in Period 2 that is in the same group as A. 1s2[1] (c) Another element, Z, in the same period of the Periodic Table as A, reacts with chlorine to form a compound with empirical formula ZCl 2. The percentage composition by mass of ZCl 2 is Z, 31.13; Cl , 68.87. (i) De ne the term relative atomic mass.[2] (ii) Calculate the relative atomic mass, Ar, of Z. Give your answer to three signi cantgures.UCLES 2014 9701/21/M/J/14 Ar of Z =[2]<br /> PMT (d) The chlorides of elements in Period 3 of the Periodic Table show different behaviours on addition to water, depending on their structure and bonding. (i) Write equations to show the behaviour of sodium chloride, NaCl , and silicon chloride, SiCl 4 , when separately added to an excess of water. NaClSiCl 4[2] (ii) State and explain the differences in behaviour of these two chlorides when added to water, in terms of their structure and the bonding found in the compounds.[4] (e) Sulfur reacts withuorine to form SF6. State the shape and bond angle of SF6. shape of SF6bond angle of SF6[2] [Total: 18]UCLES 2014 9701/21/M/J/14 [Turn over<br />

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