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Chemical Properties of Promethium and Ytterbium

Promethium
Ytterbium
Chemical Properties of Ytterbium and Promethium


Chemical Properties
Chemical Formula
Pm   
Yb   
Isotopes
  
  
Known Isotopes
27   
12
30   
9
Electronegativity
  
  
Allred Rochow Electronegativity
1.07   
32
1.06   
33
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
540.00 kJ/mol   
99+
603.40 kJ/mol   
99+
2nd Energy Level
1,050.00 kJ/mol   
99+
1,174.80 kJ/mol   
99+
3rd Energy Level
2,150.00 kJ/mol   
99+
2,417.00 kJ/mol   
99+
4th Energy Level
3,970.00 kJ/mol   
38
4,203.00 kJ/mol   
31
Electrochemical Equivalent
1.80 g/amp-hr   
36
2.15 g/amp-hr   
25
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Solubility   
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