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Chemical Properties of Praseodymium and Tantalum

Praseodymium
Tantalum
Chemical Properties of Tantalum and Praseodymium


Chemical Properties
Chemical Formula
Pr   
Ta   
Isotopes
  
  
Known Isotopes
31   
8
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.13   
99+
1.50   
27
Allred Rochow Electronegativity
1.07   
32
1.33   
22
Allen Electronegativity
Not Available   
1.34   
33
Electropositivity
  
  
Pauling Electropositivity
2.87   
12
2.50   
27
Ionization Energies
  
  
1st Energy Level
527.00 kJ/mol   
99+
761.00 kJ/mol   
18
2nd Energy Level
1,020.00 kJ/mol   
99+
1,500.00 kJ/mol   
40
3rd Energy Level
2,086.00 kJ/mol   
99+
Not Available   
4th Energy Level
3,761.00 kJ/mol   
99+
Not Available   
5th Energy Level
5,551.00 kJ/mol   
29
Not Available   
Electrochemical Equivalent
1.75 g/amp-hr   
40
1.35 g/amp-hr   
99+
Electron Work Function
2.70 eV   
99+
4.25 eV   
21
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes   
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
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