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Chemical Properties of Promethium and Europium

Promethium
Europium
Chemical Properties of Europium and Promethium


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

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