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Chemical Properties of Promethium and Terbium

Promethium
Terbium
Chemical Properties of Terbium and Promethium


Chemical Properties
Chemical Formula
Pm   
Tb   
Isotopes
  
  
Known Isotopes
27   
12
26   
13
Electronegativity
  
  
Allred Rochow Electronegativity
1.07   
32
1.10   
30
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
1.98 g/amp-hr   
31
Electron Work Function
Not Available   
3.00 eV   
36
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Solubility   
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Lanthanide Metals

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