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Chemical Properties of Protactinium and Erbium

Protactinium
Erbium
Chemical Properties of Erbium and Protactinium


Chemical Properties
Chemical Formula
Pa   
Er   
Isotopes
  
  
Known Isotopes
27   
12
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.50   
27
1.24   
36
Allred Rochow Electronegativity
1.14   
28
1.11   
29
Electropositivity
  
  
Pauling Electropositivity
2.50   
27
2.76   
18
Ionization Energies
  
  
1st Energy Level
568.00 kJ/mol   
99+
589.30 kJ/mol   
99+
2nd Energy Level
1,128.00 kJ/mol   
99+
1,150.00 kJ/mol   
99+
3rd Energy Level
1,814.00 kJ/mol   
99+
2,194.00 kJ/mol   
99+
4th Energy Level
2,991.00 kJ/mol   
99+
4,120.00 kJ/mol   
33
Electrochemical Equivalent
1.72 g/amp-hr   
99+
2.08 g/amp-hr   
28
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Solubility   
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