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Chemical Properties of Thorium and Lanthanum

Thorium
Lanthanum
Chemical Properties of Lanthanum and Thorium


Chemical Properties
Chemical Formula
Th   
La   
Isotopes
  
  
Known Isotopes
28   
11
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
1.10   
99+
Allred Rochow Electronegativity
1.11   
29
1.08   
31
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
2.90   
10
Ionization Energies
  
  
1st Energy Level
587.00 kJ/mol   
99+
538.10 kJ/mol   
99+
2nd Energy Level
1,110.00 kJ/mol   
99+
1,067.00 kJ/mol   
99+
3rd Energy Level
1,978.00 kJ/mol   
99+
1,850.30 kJ/mol   
99+
4th Energy Level
2,780.00 kJ/mol   
99+
4,819.00 kJ/mol   
22
5th Energy Level
Not Available   
5,940.00 kJ/mol   
25
Electrochemical Equivalent
2.16 g/amp-hr   
24
1.73 g/amp-hr   
99+
Electron Work Function
3.41 eV   
32
3.50 eV   
31
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Solubility   
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