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Chemical Properties of Neptunium and Lanthanum

Neptunium
Lanthanum
Chemical Properties of Lanthanum and Neptunium


Chemical Properties
Chemical Formula
Np   
La   
Isotopes
  
  
Known Isotopes
20   
19
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.36   
29
1.10   
99+
Allred Rochow Electronegativity
1.22   
26
1.08   
31
Electropositivity
  
  
Pauling Electropositivity
2.64   
25
2.90   
10
Ionization Energies
  
  
1st Energy Level
604.50 kJ/mol   
99+
538.10 kJ/mol   
99+
2nd Energy Level
1,128.00 kJ/mol   
99+
1,067.00 kJ/mol   
99+
3rd Energy Level
1,997.00 kJ/mol   
99+
1,850.30 kJ/mol   
99+
4th Energy Level
3,242.00 kJ/mol   
99+
4,819.00 kJ/mol   
22
5th Energy Level
Not Available   
5,940.00 kJ/mol   
25
Electrochemical Equivalent
1.77 g/amp-hr   
39
1.73 g/amp-hr   
99+
Electron Work Function
Not Available   
3.50 eV   
31
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Solubility   
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