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Chemical Properties of Promethium and Radium

Promethium
Radium
Chemical Properties of Radium and Promethium


Chemical Properties
Chemical Formula
Pm   
Ra   
Isotopes
  
  
Known Isotopes
27   
12
33   
6
Electronegativity
  
  
Pauling Electronegativity
Not Available   
0.90   
99+
Allred Rochow Electronegativity
1.07   
32
0.97   
38
Mulliken-Jaffe Electronegativity
Not Available   
0.92   
20
Allen Electronegativity
Not Available   
0.89   
99+
Electropositivity
  
  
Pauling Electropositivity
Not Available   
3.10   
5
Ionization Energies
  
  
1st Energy Level
540.00 kJ/mol   
99+
509.30 kJ/mol   
99+
2nd Energy Level
1,050.00 kJ/mol   
99+
979.00 kJ/mol   
99+
3rd Energy Level
2,150.00 kJ/mol   
99+
Not Available   
4th Energy Level
3,970.00 kJ/mol   
38
Not Available   
Electrochemical Equivalent
1.80 g/amp-hr   
36
4.22 g/amp-hr   
6
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Radioactivity   
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