OCR A Jun 2013 Paper 1 Q5

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5 Periodicity is a repeating pattern across different periods. 12 (a) First ionisation energy shows a trend across Period 2. The first ionisation energies of lithium, carbon and fluorine are shown in Table 5.1 below. Element First ionisation energy / kJ mol1 Lithium 520 Table 5.1 Carbon 1086 Fluorine 1681 (i) Explain the trend across Period 2 shown in Table 5.1. In your answer, you should use appropriate technical terms, spelled correctly.[3] (ii) Solid carbon exists in two forms, diamond and graphite. Explain why it is unnecessary to refer to carbon as either diamond or graphite in Table 5.1.[1]OCR 2013<br /> (b) Lithium, carbon (in the form of diamond) and fluorine have very different melting points. 13 These differences in melting points are the result of different types of structure and different forces or bonds between the particles in the structures. Part of the table below has been filled in. Complete the table below. Lithium Carbon (diamond) Fluorine Melting point / C 181 3550 220 Structure Giant Simple Force or bond overcome on melting Metallic bond Particles between which the force or bond is acting [6] [Total: 10] END OF QUESTION PAPEROCR 2013<br />

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