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Chemical Properties of Promethium and Thulium

Promethium
Thulium
Chemical Properties of Thulium and Promethium


Chemical Properties
Chemical Formula
Pm   
Tm   
Isotopes
  
  
Known Isotopes
27   
12
32   
7
Electronegativity
  
  
Pauling Electronegativity
Not Available   
1.25   
35
Allred Rochow Electronegativity
1.07   
32
1.11   
29
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.75   
19
Ionization Energies
  
  
1st Energy Level
540.00 kJ/mol   
99+
596.70 kJ/mol   
99+
2nd Energy Level
1,050.00 kJ/mol   
99+
1,160.00 kJ/mol   
99+
3rd Energy Level
2,150.00 kJ/mol   
99+
2,285.00 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
2.10 g/amp-hr   
26
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Solubility   
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Lanthanide Metals

Lanthanide Metals

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