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Chemical Properties of Neptunium and Praseodymium

Neptunium
Praseodymium
Chemical Properties of Praseodymium and Neptunium


Chemical Properties
Chemical Formula
Np   
Pr   
Isotopes
  
  
Known Isotopes
20   
19
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.36   
29
1.13   
99+
Allred Rochow Electronegativity
1.22   
26
1.07   
32
Electropositivity
  
  
Pauling Electropositivity
2.64   
25
2.87   
12
Ionization Energies
  
  
1st Energy Level
604.50 kJ/mol   
99+
527.00 kJ/mol   
99+
2nd Energy Level
1,128.00 kJ/mol   
99+
1,020.00 kJ/mol   
99+
3rd Energy Level
1,997.00 kJ/mol   
99+
2,086.00 kJ/mol   
99+
4th Energy Level
3,242.00 kJ/mol   
99+
3,761.00 kJ/mol   
99+
5th Energy Level
Not Available   
5,551.00 kJ/mol   
29
Electrochemical Equivalent
1.77 g/amp-hr   
39
1.75 g/amp-hr   
40
Electron Work Function
Not Available   
2.70 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
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