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Chemical Properties of Erbium and Hafnium

Erbium
Hafnium
Chemical Properties of Hafnium and Erbium


Chemical Properties
Chemical Formula
Er   
Hf   
Isotopes
  
  
Known Isotopes
31   
8
32   
7
Electronegativity
  
  
Pauling Electronegativity
1.24   
36
1.30   
32
Allred Rochow Electronegativity
1.11   
29
1.23   
25
Allen Electronegativity
Not Available   
1.16   
37
Electropositivity
  
  
Pauling Electropositivity
2.76   
18
2.70   
22
Ionization Energies
  
  
1st Energy Level
589.30 kJ/mol   
99+
658.50 kJ/mol   
40
2nd Energy Level
1,150.00 kJ/mol   
99+
1,440.00 kJ/mol   
99+
3rd Energy Level
2,194.00 kJ/mol   
99+
2,250.00 kJ/mol   
99+
4th Energy Level
4,120.00 kJ/mol   
33
3,216.00 kJ/mol   
99+
Electrochemical Equivalent
2.08 g/amp-hr   
28
1.66 g/amp-hr   
99+
Electron Work Function
Not Available   
3.90 eV   
27
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
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