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Chemical Properties of Lanthanum and Thorium

Lanthanum
Thorium
Chemical Properties of Thorium and Lanthanum


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