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Chemical Properties of Radium and Hafnium

Radium
Hafnium
Chemical Properties of Hafnium and Radium


Chemical Properties
Chemical Formula
Ra   
Hf   
Isotopes
  
  
Known Isotopes
33   
6
32   
7
Electronegativity
  
  
Pauling Electronegativity
0.90   
99+
1.30   
32
Allred Rochow Electronegativity
0.97   
38
1.23   
25
Mulliken-Jaffe Electronegativity
0.92   
20
Not Available   
Allen Electronegativity
0.89   
99+
1.16   
37
Electropositivity
  
  
Pauling Electropositivity
3.10   
5
2.70   
22
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol   
99+
658.50 kJ/mol   
40
2nd Energy Level
979.00 kJ/mol   
99+
1,440.00 kJ/mol   
99+
3rd Energy Level
Not Available   
2,250.00 kJ/mol   
99+
4th Energy Level
Not Available   
3,216.00 kJ/mol   
99+
Electrochemical Equivalent
4.22 g/amp-hr   
6
1.66 g/amp-hr   
99+
Electron Work Function
Not Available   
3.90 eV   
27
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
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