AQA Jun 2011 Paper 1 Q4

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do not write outside the box there are several types of crystal structure and bonding shown by elements and compounds a i name the type of bonding in the element sodium mark a ii use your knowledge of structure and bonding to draw a diagram that shows how the particles are arranged in a crystal of sodium you should identify the particles and show a minimum of six particles in a two dimensional diagram b sodium reacts with chlorine to form sodium chloride b i name the type of bonding in sodium chloride mark b ii explain why the melting point of sodium chloride is high marks marks extra space wmp jun chem do not write outside the box c the table below shows the melting points of some sodium halides melting point k nacl nabr nai suggest why the melting point of sodium iodide is lower than the melting point of sodium bromide mark turn over for the next question turn over wmp jun chem do not write outside the box a this question is about the first ionisation energies of some elements in the periodic table write an equation including state symbols to show the reaction that occurs when the first ionisation energy of lithium is measured mark b state and explain the general trend in first ionisation energies for the period elements aluminium to argon trend explanation marks extra space c there is a similar general trend in first ionisation energies for the period elements gallium to krypton state how selenium deviates from this general trend and explain your answer how selenium deviates from this trend explanation marks extra space d suggest why the first ionisation energy of krypton is lower than the first ionisation energy of argon mark wmp jun chem

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