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Chemical Properties of Hafnium and Actinium

Hafnium
Actinium
Chemical Properties of Actinium and Hafnium


Chemical Properties
Chemical Formula
Hf   
Ac   
Isotopes
  
  
Known Isotopes
32   
7
29   
10
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
1.10   
99+
Allred Rochow Electronegativity
1.23   
25
1.00   
36
Allen Electronegativity
1.16   
37
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
2.90   
10
Ionization Energies
  
  
1st Energy Level
658.50 kJ/mol   
40
499.00 kJ/mol   
99+
2nd Energy Level
1,440.00 kJ/mol   
99+
1,170.00 kJ/mol   
99+
3rd Energy Level
2,250.00 kJ/mol   
99+
1,900.00 kJ/mol   
99+
4th Energy Level
3,216.00 kJ/mol   
99+
4,700.00 kJ/mol   
23
Electrochemical Equivalent
1.66 g/amp-hr   
99+
2.82 g/amp-hr   
18
Electron Work Function
3.90 eV   
27
Not Available   
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
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