1 Trends down the group

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Oxford Textbook Pages : 154 - 155

CGP Revision Guide Pages : 96

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Show Specification Ref : 3.2.2

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Question 1 / 4

June 2010 QP – Unit 1 AQA Chemistry A-level_question_2 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 do not write outside the box e identify the element in period that has the highest first ionisation energy and give its electron configuration element electron configuration marks f state the trend in first ionisation energies in group from beryllium to barium explain your answer in terms of a suitable model of atomic structure trend explanation marks extra space turn over for the next question turn over wmp jun chem do not write outside the box in this question give all your answers to three significant figures magnesium nitrate decomposes on heating to form magnesium oxide nitrogen dioxide and oxygen as shown in the following equation mg no s mgo s no g o g a thermal decomposition of a sample of magnesium nitrate produced g of magnesium oxide a i calculate the amount in moles of mgo in g of magnesium oxide marks a ii calculate the total amount in moles of gas produced from this sample of magnesium nitrate mark b in another experiment a different sample of magnesium nitrate decomposed to produce mol of gas calculate the volume in dm that this gas would occupy at k and pa the gas constant r j k mol marks extra space wmp jun chem
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Question 2 / 4

January 2012 QP – Unit 2 AQA Chemistry A-level_question_7 do not write outside the box a group elements and their compounds have a wide range of uses for parts a i to a iii draw a ring around the correct answer to complete each sentence a i from mg oh to ba oh the solubility in water increases decreases stays the same mark a ii from mg to ba the first ionisation energy increases decreases stays the same mark a iii from mg to ba the atomic radius increases decreases stays the same mark b explain why calcium has a higher melting point than strontium marks extra space wmp jan chem do not write outside the box c acidified barium chloride solution is used as a reagent to test for sulfate ions c i state why sulfuric acid should not be used to acidify the barium chloride mark c ii write the simplest ionic equation for the reaction that occurs when acidified barium chloride solution is added to a solution containing sulfate ions mark turn over for the next question turn over wmp jan chem
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Question 3 / 4

June 2012 QP – Unit 2 AQA Chemistry A-level_question_5 do not write outside the box there are many uses for compounds of barium a i write an equation for the reaction of barium with water mark a ii state the trend in reactivity with water of the group metals from mg to ba mark b give the formula of the least soluble hydroxide of the group metals from mg to ba mark c state how barium sulfate is used in medicine explain why this use is possible given that solutions containing barium ions are poisonous use explanation marks extra space wmp jun chem
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Question 4 / 4

June 2015 QP – Unit 2 AQA Chemistry A-level_question_3 do not write outside the box a the elements in group from mg to ba can be used to show the trends in properties down a group in the periodic table state the trend in atomic radius for atoms of the elements down group from mg to ba give a reason for this trend marks trend reason b the group elements react with water b i state the trend in reactivity with water of the elements down group from mg to ba mark b ii write an equation for the reaction of strontium with water mark c give the formula of the hydroxide of the element in group from mg to ba that is most soluble in water mark turn over wmp jun chem
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