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Chemical Properties of Thorium and Samarium

Thorium
Samarium
Chemical Properties of Samarium and Thorium


Chemical Properties
Chemical Formula
Th   
Sm   
Isotopes
  
  
Known Isotopes
28   
11
30   
9
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
1.17   
40
Allred Rochow Electronegativity
1.11   
29
1.07   
32
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
2.83   
14
Ionization Energies
  
  
1st Energy Level
587.00 kJ/mol   
99+
544.50 kJ/mol   
99+
2nd Energy Level
1,110.00 kJ/mol   
99+
1,070.00 kJ/mol   
99+
3rd Energy Level
1,978.00 kJ/mol   
99+
2,260.00 kJ/mol   
99+
4th Energy Level
2,780.00 kJ/mol   
99+
3,990.00 kJ/mol   
37
Electrochemical Equivalent
2.16 g/amp-hr   
24
1.87 g/amp-hr   
34
Electron Work Function
3.41 eV   
32
2.70 eV   
99+
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes   
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