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Chemical Properties of Hafnium and Iridium

Hafnium
Iridium
Chemical Properties of Iridium and Hafnium


Chemical Properties
Chemical Formula
Hf   
Ir   
Isotopes
  
  
Known Isotopes
32   
7
34   
5
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
2.20   
4
Allred Rochow Electronegativity
1.23   
25
1.55   
11
Allen Electronegativity
1.16   
37
1.68   
17
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
1.80   
99+
Ionization Energies
  
  
1st Energy Level
658.50 kJ/mol   
40
880.00 kJ/mol   
9
2nd Energy Level
1,440.00 kJ/mol   
99+
1,600.00 kJ/mol   
35
3rd Energy Level
2,250.00 kJ/mol   
99+
Not Available   
4th Energy Level
3,216.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
1.66 g/amp-hr   
99+
1.14 g/amp-hr   
99+
Electron Work Function
3.90 eV   
27
4.55 eV   
13
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Flammable, Ionization, Radioactive Isotopes, Radioactivity   
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