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Chemical Properties of Promethium and Roentgenium

Promethium
Roentgenium
Chemical Properties of Roentgenium and Promethium


Chemical Properties
Chemical Formula
Pm   
Rg   
Isotopes
  
  
Known Isotopes
27   
12
1   
34
Electronegativity
  
  
Allred Rochow Electronegativity
1.07   
32
Not Available   
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
540.00 kJ/mol   
99+
1,022.70 kJ/mol   
3
2nd Energy Level
1,050.00 kJ/mol   
99+
2,074.40 kJ/mol   
10
3rd Energy Level
2,150.00 kJ/mol   
99+
3,077.90 kJ/mol   
24
4th Energy Level
3,970.00 kJ/mol   
38
4,052.40 kJ/mol   
36
5th Energy Level
Not Available   
5,306.70 kJ/mol   
31
Electrochemical Equivalent
1.80 g/amp-hr   
36
Not Available   
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
NA   
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