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        Summary 
        
         
          
           | DescriptionFirst Ionization Energy.svg | 
           
             English: Graph of ionization energy vs. atomic number. 
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           | Date | 
           16 February 2013, 10:06:40 | 
          
          
           | Source | 
            http://commons.wikimedia.org/wiki/File:Erste_Ionisierungsenergie_PSE_color_coded.png | 
          
          
           | Author | 
            User:Sponk | 
          
         
         
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