AQA Jun 2010 Paper 1 Q1

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section a do not write outside the box answer all questions in the spaces provided fluorine forms many compounds that contain covalent bonds a i state the meaning of the term covalent bond mark a ii write an equation to show the formation of one molecule of cif from chlorine and fluorine molecules mark b draw the shape of a dichlorodifluoromethane molecule cci f and the shape of a chlorine trifluoride molecule cif include any lone pairs of electrons that influence the shape shape of cci f shape of cif c suggest the strongest type of intermolecular force between cci f molecules mark marks wmp jun chem do not write outside the box d bf is a covalent molecule that reacts with an f ion to form a bf ion d i name the type of bond formed when a molecule of bf reacts with an f ion explain how this bond is formed type of bond explanation marks extra space d ii state the bond angle in the bf ion mark e an ultrasound imaging agent has the formula c f it can be made by the reaction of butane and fluorine as shown in the following equation c h f c f hf calculate the percentage atom economy for the formation of c f in this reaction give your answer to three significant figures marks turn over wmp jun chem the following diagram shows the first ionisation energies of some period elements do not write outside the box first ionisation energy kj mol na mg al si cl a draw a cross on the diagram to show the first ionisation energy of aluminium mark b write an equation to show the process that occurs when the first ionisation energy of aluminium is measured marks c state which of the first second or third ionisations of aluminium would produce an ion with the electron configuration s s p s mark d explain why the value of the first ionisation energy of sulfur is less than the value of the first ionisation energy of phosphorus marks extra space wmp jun chem

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