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Chemical Properties of Samarium and Lanthanum


Chemical Properties of Lanthanum and Samarium


Chemical Properties

Chemical Formula
Sm   
La   

Isotopes
  
  

Known Isotopes
30   
9
31   
8

Electronegativity
  
  

Pauling Electronegativity
1.17   
40
1.10   
99+

Allred Rochow Electronegativity
1.07   
32
1.08   
31

Electropositivity
  
  

Pauling Electropositivity
2.83   
14
2.90   
10

Ionization Energies
  
  

1st Energy Level
544.50 kJ/mol   
99+
538.10 kJ/mol   
99+

2nd Energy Level
1,070.00 kJ/mol   
99+
1,067.00 kJ/mol   
99+

3rd Energy Level
2,260.00 kJ/mol   
99+
1,850.30 kJ/mol   
99+

4th Energy Level
3,990.00 kJ/mol   
37
4,819.00 kJ/mol   
22

5th Energy Level
Not Available   
5,940.00 kJ/mol   
25

Electrochemical Equivalent
1.87 g/amp-hr   
34
1.73 g/amp-hr   
99+

Electron Work Function
2.70 eV   
99+
3.50 eV   
31

Other Chemical Properties
Ionization, Radioactive Isotopes   
Ionization, Radioactive Isotopes, Solubility   

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