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Chemical Properties of Europium and Promethium

Europium
Promethium
Chemical Properties of Promethium and Europium


Chemical Properties
Chemical Formula
Eu   
Pm   
Isotopes
  
  
Known Isotopes
31   
8
27   
12
Electronegativity
  
  
Pauling Electronegativity
1.20   
39
Not Available   
Sanderson Electronegativity
1.01   
22
Not Available   
Allred Rochow Electronegativity
Not Available   
1.07   
32
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
547.10 kJ/mol   
99+
540.00 kJ/mol   
99+
2nd Energy Level
1,085.00 kJ/mol   
99+
1,050.00 kJ/mol   
99+
3rd Energy Level
2,404.00 kJ/mol   
99+
2,150.00 kJ/mol   
99+
4th Energy Level
4,120.00 kJ/mol   
33
3,970.00 kJ/mol   
38
Electrochemical Equivalent
1.89 g/amp-hr   
33
1.80 g/amp-hr   
36
Electron Work Function
2.50 eV   
99+
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Solubility   
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