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Chemical Properties of Hafnium and Samarium

Hafnium
Samarium
Chemical Properties of Samarium and Hafnium


Chemical Properties
Chemical Formula
Hf   
Sm   
Isotopes
  
  
Known Isotopes
32   
7
30   
9
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
1.17   
40
Allred Rochow Electronegativity
1.23   
25
1.07   
32
Allen Electronegativity
1.16   
37
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
2.83   
14
Ionization Energies
  
  
1st Energy Level
658.50 kJ/mol   
40
544.50 kJ/mol   
99+
2nd Energy Level
1,440.00 kJ/mol   
99+
1,070.00 kJ/mol   
99+
3rd Energy Level
2,250.00 kJ/mol   
99+
2,260.00 kJ/mol   
99+
4th Energy Level
3,216.00 kJ/mol   
99+
3,990.00 kJ/mol   
37
Electrochemical Equivalent
1.66 g/amp-hr   
99+
1.87 g/amp-hr   
34
Electron Work Function
3.90 eV   
27
2.70 eV   
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes   
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