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Chemical Properties of Actinium and Tantalum

Actinium
Tantalum
Chemical Properties of Tantalum and Actinium


Chemical Properties
Chemical Formula
Ac   
Ta   
Isotopes
  
  
Known Isotopes
29   
10
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.10   
99+
1.50   
27
Allred Rochow Electronegativity
1.00   
36
1.33   
22
Allen Electronegativity
Not Available   
1.34   
33
Electropositivity
  
  
Pauling Electropositivity
2.90   
10
2.50   
27
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol   
99+
761.00 kJ/mol   
18
2nd Energy Level
1,170.00 kJ/mol   
99+
1,500.00 kJ/mol   
40
3rd Energy Level
1,900.00 kJ/mol   
99+
Not Available   
4th Energy Level
4,700.00 kJ/mol   
23
Not Available   
Electrochemical Equivalent
2.82 g/amp-hr   
18
1.35 g/amp-hr   
99+
Electron Work Function
Not Available   
4.25 eV   
21
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
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