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Chemical Properties of Strontium and Protactinium

Strontium
Protactinium
Chemical Properties of Protactinium and Strontium


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