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Chemical Properties of Radium and Samarium

Radium
Samarium
Chemical Properties of Samarium and Radium


Chemical Properties
Chemical Formula
Ra   
Sm   
Isotopes
  
  
Known Isotopes
33   
6
30   
9
Electronegativity
  
  
Pauling Electronegativity
0.90   
99+
1.17   
40
Allred Rochow Electronegativity
0.97   
38
1.07   
32
Mulliken-Jaffe Electronegativity
0.92   
20
Not Available   
Allen Electronegativity
0.89   
99+
Not Available   
Electropositivity
  
  
Pauling Electropositivity
3.10   
5
2.83   
14
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol   
99+
544.50 kJ/mol   
99+
2nd Energy Level
979.00 kJ/mol   
99+
1,070.00 kJ/mol   
99+
3rd Energy Level
Not Available   
2,260.00 kJ/mol   
99+
4th Energy Level
Not Available   
3,990.00 kJ/mol   
37
Electrochemical Equivalent
4.22 g/amp-hr   
6
1.87 g/amp-hr   
34
Electron Work Function
Not Available   
2.70 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes   
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