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Worksheet 2. Basic Atomic Structure - Isotope Notation

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Fill in the information missing in the table below.
 
Name 
Symbol 
Proton # 
Electron # 
Neutron # 
Iron-57 
26
26 
31 
 
     
Polonium-___  
84 
  
126
Potassium-___       
21
     
27
32
Copper-63        
   
60 
     
6 
8 
Gold-197