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Chemical Properties of Ytterbium and Promethium

Ytterbium
Promethium
Chemical Properties of Promethium and Ytterbium


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