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Chemical Properties of Protactinium and Scandium

Protactinium
Scandium
Chemical Properties of Scandium and Protactinium


Chemical Properties
Chemical Formula
Pa   
Sc   
Isotopes
  
  
Known Isotopes
27   
12
13   
26
Electronegativity
  
  
Pauling Electronegativity
1.50   
27
1.36   
29
Sanderson Electronegativity
Not Available   
1.02   
21
Allred Rochow Electronegativity
1.14   
28
1.20   
27
Allen Electronegativity
Not Available   
1.19   
36
Electropositivity
  
  
Pauling Electropositivity
2.50   
27
2.64   
25
Ionization Energies
  
  
1st Energy Level
568.00 kJ/mol   
99+
633.10 kJ/mol   
99+
2nd Energy Level
1,128.00 kJ/mol   
99+
1,235.00 kJ/mol   
99+
3rd Energy Level
1,814.00 kJ/mol   
99+
2,388.60 kJ/mol   
99+
4th Energy Level
2,991.00 kJ/mol   
99+
7,090.60 kJ/mol   
6
5th Energy Level
Not Available   
8,843.00 kJ/mol   
6
6th Energy Level
Not Available   
10,679.00 kJ/mol   
7
7th Energy level
Not Available   
13,310.00 kJ/mol   
8
8th Energy Level
Not Available   
15,250.00 kJ/mol   
11
9th Energy Level
Not Available   
17,370.00 kJ/mol   
14
10th Energy Level
Not Available   
21,726.00 kJ/mol   
13
11th Energy Level
Not Available   
24,102.00 kJ/mol   
16
12th Energy Level
Not Available   
66,320.00 kJ/mol   
2
13th Energy Level
Not Available   
73,010.00 kJ/mol   
2
14th Energy Level
Not Available   
80,160.00 kJ/mol   
3
15th Energy Level
Not Available   
89,490.00 kJ/mol   
4
16th Energy Level
Not Available   
97,400.00 kJ/mol   
5
17th Energy Level
Not Available   
105,600.00 kJ/mol   
6
18th Energy Level
Not Available   
117,000.00 kJ/mol   
7
19th Energy Level
Not Available   
124,270.00 kJ/mol   
8
Electrochemical Equivalent
1.72 g/amp-hr   
99+
0.56 g/amp-hr   
99+
Electron Work Function
Not Available   
3.50 eV   
31
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility   
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