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Chemical Properties of Hafnium and Praseodymium

Hafnium
Praseodymium
Chemical Properties of Praseodymium and Hafnium


Chemical Properties
Chemical Formula
Hf   
Pr   
Isotopes
  
  
Known Isotopes
32   
7
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
1.13   
99+
Allred Rochow Electronegativity
1.23   
25
1.07   
32
Allen Electronegativity
1.16   
37
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
2.87   
12
Ionization Energies
  
  
1st Energy Level
658.50 kJ/mol   
40
527.00 kJ/mol   
99+
2nd Energy Level
1,440.00 kJ/mol   
99+
1,020.00 kJ/mol   
99+
3rd Energy Level
2,250.00 kJ/mol   
99+
2,086.00 kJ/mol   
99+
4th Energy Level
3,216.00 kJ/mol   
99+
3,761.00 kJ/mol   
99+
5th Energy Level
Not Available   
5,551.00 kJ/mol   
29
Electrochemical Equivalent
1.66 g/amp-hr   
99+
1.75 g/amp-hr   
40
Electron Work Function
3.90 eV   
27
2.70 eV   
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
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