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Chemical Properties of Terbium and Promethium

Terbium
Promethium
Chemical Properties of Promethium and Terbium


Chemical Properties
Chemical Formula
Tb   
Pm   
Isotopes
  
  
Known Isotopes
26   
13
27   
12
Electronegativity
  
  
Allred Rochow Electronegativity
1.10   
30
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
1.98 g/amp-hr   
31
1.80 g/amp-hr   
36
Electron Work Function
3.00 eV   
36
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Solubility   
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