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Chemical Properties of Protactinium and Strontium

Protactinium
Strontium
Chemical Properties of Strontium and Protactinium


Chemical Properties
Chemical Formula
Pa   
Sr   
Isotopes
  
  
Known Isotopes
27   
12
27   
12
Electronegativity
  
  
Pauling Electronegativity
1.50   
27
0.95   
99+
Sanderson Electronegativity
Not Available   
0.72   
27
Allred Rochow Electronegativity
1.14   
28
0.99   
37
Mulliken-Jaffe Electronegativity
Not Available   
1.00   
18
Allen Electronegativity
Not Available   
0.96   
40
Electropositivity
  
  
Pauling Electropositivity
2.50   
27
3.05   
7
Ionization Energies
  
  
1st Energy Level
568.00 kJ/mol   
99+
549.50 kJ/mol   
99+
2nd Energy Level
1,128.00 kJ/mol   
99+
1,064.20 kJ/mol   
99+
3rd Energy Level
1,814.00 kJ/mol   
99+
4,138.00 kJ/mol   
10
4th Energy Level
2,991.00 kJ/mol   
99+
5,500.00 kJ/mol   
13
5th Energy Level
Not Available   
6,910.00 kJ/mol   
18
6th Energy Level
Not Available   
8,760.00 kJ/mol   
18
7th Energy level
Not Available   
10,230.00 kJ/mol   
19
8th Energy Level
Not Available   
11,800.00 kJ/mol   
19
9th Energy Level
Not Available   
15,600.00 kJ/mol   
17
10th Energy Level
Not Available   
17,100.00 kJ/mol   
19
11th Energy Level
Not Available   
31,270.00 kJ/mol   
6
Electrochemical Equivalent
1.72 g/amp-hr   
99+
1.64 g/amp-hr   
99+
Electron Work Function
Not Available   
2.59 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
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