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Chemical Properties of Uranium and Protactinium


Chemical Properties of Protactinium and Uranium


Chemical Properties

Chemical Formula
U   
Pa   

Isotopes
  
  

Known Isotopes
25   
14
27   
12

Electronegativity
  
  

Pauling Electronegativity
1.38   
28
1.50   
27

Allred Rochow Electronegativity
1.22   
26
1.14   
28

Electropositivity
  
  

Pauling Electropositivity
2.62   
26
2.50   
27

Ionization Energies
  
  

1st Energy Level
597.60 kJ/mol   
99+
568.00 kJ/mol   
99+

2nd Energy Level
1,420.00 kJ/mol   
99+
1,128.00 kJ/mol   
99+

3rd Energy Level
1,900.00 kJ/mol   
99+
1,814.00 kJ/mol   
99+

4th Energy Level
3,145.00 kJ/mol   
99+
2,991.00 kJ/mol   
99+

Electrochemical Equivalent
1.48 g/amp-hr   
99+
1.72 g/amp-hr   
99+

Electron Work Function
3.63 eV   
30
Not Available   

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity   

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