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Chemical Properties of Promethium and Beryllium

Promethium
Beryllium
Chemical Properties of Beryllium and Promethium


Chemical Properties
Chemical Formula
Pm   
Be   
Isotopes
  
  
Known Isotopes
27   
12
9   
29
Electronegativity
  
  
Pauling Electronegativity
Not Available   
1.57   
24
Sanderson Electronegativity
Not Available   
1.81   
12
Allred Rochow Electronegativity
1.07   
32
1.47   
14
Mulliken-Jaffe Electronegativity
Not Available   
1.54   
12
Allen Electronegativity
Not Available   
1.58   
23
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.43   
30
Ionization Energies
  
  
1st Energy Level
540.00 kJ/mol   
99+
899.50 kJ/mol   
7
2nd Energy Level
1,050.00 kJ/mol   
99+
1,757.10 kJ/mol   
23
3rd Energy Level
2,150.00 kJ/mol   
99+
14,848.70 kJ/mol   
2
4th Energy Level
3,970.00 kJ/mol   
38
21,006.60 kJ/mol   
2
Electrochemical Equivalent
1.80 g/amp-hr   
36
0.17 g/amp-hr   
99+
Electron Work Function
Not Available   
4.98 eV   
6
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Corrosion, Ionization, Radioactive Isotopes   
Atomic >>
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