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Chemical Properties of Thallium and Promethium

Thallium
Promethium
Chemical Properties of Promethium and Thallium


Chemical Properties
Chemical Formula
Tl   
Pm   
Isotopes
  
  
Known Isotopes
32   
7
27   
12
Electronegativity
  
  
Pauling Electronegativity
1.62   
21
Not Available   
Sanderson Electronegativity
2.25   
5
Not Available   
Allred Rochow Electronegativity
1.44   
17
1.07   
32
Mulliken-Jaffe Electronegativity
1.96   
6
Not Available   
Allen Electronegativity
1.79   
13
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.38   
33
Not Available   
Ionization Energies
  
  
1st Energy Level
589.40 kJ/mol   
99+
540.00 kJ/mol   
99+
2nd Energy Level
1,971.00 kJ/mol   
14
1,050.00 kJ/mol   
99+
3rd Energy Level
2,878.00 kJ/mol   
32
2,150.00 kJ/mol   
99+
4th Energy Level
Not Available   
3,970.00 kJ/mol   
38
Electrochemical Equivalent
7.63 g/amp-hr   
2
1.80 g/amp-hr   
36
Electron Work Function
3.84 eV   
28
Not Available   
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Solubility   
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