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Chemical Properties of Tantalum and Hafnium

Tantalum
Hafnium
Chemical Properties of Hafnium and Tantalum


Chemical Properties
Chemical Formula
Ta   
Hf   
Isotopes
  
  
Known Isotopes
31   
8
32   
7
Electronegativity
  
  
Pauling Electronegativity
1.50   
27
1.30   
32
Allred Rochow Electronegativity
1.33   
22
1.23   
25
Allen Electronegativity
1.34   
33
1.16   
37
Electropositivity
  
  
Pauling Electropositivity
2.50   
27
2.70   
22
Ionization Energies
  
  
1st Energy Level
761.00 kJ/mol   
18
658.50 kJ/mol   
40
2nd Energy Level
1,500.00 kJ/mol   
40
1,440.00 kJ/mol   
99+
3rd Energy Level
Not Available   
2,250.00 kJ/mol   
99+
4th Energy Level
Not Available   
3,216.00 kJ/mol   
99+
Electrochemical Equivalent
1.35 g/amp-hr   
99+
1.66 g/amp-hr   
99+
Electron Work Function
4.25 eV   
21
3.90 eV   
27
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
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