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Chemical Properties of Neptunium and Barium

Neptunium
Barium
Chemical Properties of Barium and Neptunium


Chemical Properties
Chemical Formula
Np   
Ba   
Isotopes
  
  
Known Isotopes
20   
19
37   
2
Electronegativity
  
  
Pauling Electronegativity
1.36   
29
0.89   
99+
Sanderson Electronegativity
Not Available   
0.68   
28
Allred Rochow Electronegativity
1.22   
26
0.97   
38
Mulliken-Jaffe Electronegativity
Not Available   
0.88   
22
Allen Electronegativity
Not Available   
0.88   
99+
Electropositivity
  
  
Pauling Electropositivity
2.64   
25
3.11   
4
Ionization Energies
  
  
1st Energy Level
604.50 kJ/mol   
99+
502.90 kJ/mol   
99+
2nd Energy Level
1,128.00 kJ/mol   
99+
965.20 kJ/mol   
99+
3rd Energy Level
1,997.00 kJ/mol   
99+
3,600.00 kJ/mol   
14
4th Energy Level
3,242.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
1.77 g/amp-hr   
39
2.56 g/amp-hr   
20
Electron Work Function
Not Available   
2.70 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
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