Atomic Structure and the periodic table H 
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     Q1. 
       This question is about sodium and chlorine. 
       Figure 1 shows the positions of sodium and chlorine in the periodic table. 
                            Figure 1 
                                                     
       (a)   State one difference and one similarity in the electronic structure of sodium and of 
          chlorine. 
          Difference __________________________________________________________ 
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          Similarity ___________________________________________________________ 
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                                                        (2) 
       (b)   Sodium atoms react with chlorine atoms to produce sodium chloride (NaCl). 
          Describe what happens when a sodium atom reacts with a chlorine atom. 
          Write about electron transfer in your answer. 
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       (c)   The reaction between sodium and chlorine is an exothermic reaction. 
          Complete the reaction profile for the reaction between sodium and chlorine. 
                            Figure 2 
                                             
                                                        (2) 
                                                  (Total 8 marks) 
     Q2. 
       This question is about the periodic table. 
       In 1864 John Newlands suggested an arrangement of elements. 
       Figure 1 shows the arrangement Newlands suggested. 
                            Figure 1 
                                          
       (a)      Give two differences between the groupings in Figure 1 compared with the modern 
          periodic table. 
          1. _________________________________________________________________ 
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          2. _________________________________________________________________ 
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                                                        (2) 
       In 1869 Mendeleev produced his periodic table. 
       (b)      Why was Mendeleev’s table called a periodic table? 
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                                                        (1) 
       (c)      When Mendeleev was developing his periodic table he changed the order of some of the 
          elements. 
          Explain why. 
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                                                        (2) 
       (d)      Explain why the elements are ordered differently in the modern periodic table. 
          You should refer to isotopes. 
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                                                        (2) 
       (e)      Figure 2 shows part of the modern periodic table. 
                            Figure 2 
                                                    
          Draw one line from each statement about an element to the letter representing that 
          element. 
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                                                        (3) 
                                                 (Total 10 marks) 
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