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Chemical Properties of Neodymium and Protactinium

Neodymium
Protactinium
Chemical Properties of Protactinium and Neodymium


Chemical Properties
Chemical Formula
Nd   
Pa   
Isotopes
  
  
Known Isotopes
30   
9
27   
12
Electronegativity
  
  
Pauling Electronegativity
1.14   
99+
1.50   
27
Allred Rochow Electronegativity
1.07   
32
1.14   
28
Electropositivity
  
  
Pauling Electropositivity
2.86   
13
2.50   
27
Ionization Energies
  
  
1st Energy Level
533.10 kJ/mol   
99+
568.00 kJ/mol   
99+
2nd Energy Level
1,040.00 kJ/mol   
99+
1,128.00 kJ/mol   
99+
3rd Energy Level
2,130.00 kJ/mol   
99+
1,814.00 kJ/mol   
99+
4th Energy Level
3,900.00 kJ/mol   
99+
2,991.00 kJ/mol   
99+
Electrochemical Equivalent
1.79 g/amp-hr   
37
1.72 g/amp-hr   
99+
Electron Work Function
3.20 eV   
34
Not Available   
Other Chemical Properties
Chemical Stability, Corrosion, Flammable, Ionization   
Ionization, Radioactive Isotopes, Radioactivity   
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