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Chemical Properties of Protactinium and Osmium

Protactinium
Osmium
Chemical Properties of Osmium and Protactinium


Chemical Properties
Chemical Formula
Pa   
Os   
Isotopes
  
  
Known Isotopes
27   
12
35   
4
Electronegativity
  
  
Pauling Electronegativity
1.50   
27
2.20   
4
Allred Rochow Electronegativity
1.14   
28
1.52   
12
Allen Electronegativity
Not Available   
1.65   
19
Electropositivity
  
  
Pauling Electropositivity
2.50   
27
1.80   
99+
Ionization Energies
  
  
1st Energy Level
568.00 kJ/mol   
99+
840.00 kJ/mol   
12
2nd Energy Level
1,128.00 kJ/mol   
99+
1,309.80 kJ/mol   
99+
3rd Energy Level
1,814.00 kJ/mol   
99+
1,600.00 kJ/mol   
99+
4th Energy Level
2,991.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
1.72 g/amp-hr   
99+
1.77 g/amp-hr   
38
Electron Work Function
Not Available   
4.83 eV   
8
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Chemical Stability, Ionization, Solubility   
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