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Atomic Structure of Protactinium and Actinium

Protactinium
Actinium
Atomic Structure of Actinium and Protactinium


Atomic Properties
Atomic Number
91   
27
89   
29
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Rn] 6d1 7s2   
Crystal Structure
Tetragonal (TETR)   
Face Centered Cubic (FCC)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
FCC-Crystal-Structure-of-Actinium.jpg#100   
Atom
  
  
Number of Protons
91   
27
89   
29
Number of Neutrons
122   
21
138   
16
Number of Electrons
91   
27
89   
29
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
195.00 pm   
7
Covalent Radius
200.00 pm   
11
Not Available   
Van der Waals Radius
243.00 pm   
11
Not Available   
Atomic Weight
231.04 amu   
24
227.00 amu   
25
Atomic Volume
15.00 cm3/mol   
34
22.54 cm3/mol   
11
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Radium
  
Next Element
Uranium
  
Thorium
  
Valence Electron Potential
92.00 (-eV)   
11
38.60 (-eV)   
99+
Lattice Constant
392.50 pm   
23
567.00 pm   
8
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
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