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Atomic Structure of Protactinium and Thorium

Protactinium
Thorium
Atomic Structure of Thorium and Protactinium


Atomic Properties
Atomic Number
91   
27
90   
28
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Rn] 6d2 7s2   
Crystal Structure
Tetragonal (TETR)   
Face Centered Cubic (FCC)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
FCC-Crystal-Structure-of-Thorium.jpg#100   
Atom
  
  
Number of Protons
91   
27
90   
28
Number of Neutrons
122   
21
142   
15
Number of Electrons
91   
27
90   
28
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
179.80 pm   
15
Covalent Radius
200.00 pm   
11
206.00 pm   
7
Van der Waals Radius
243.00 pm   
11
237.00 pm   
15
Atomic Weight
231.04 amu   
24
232.04 amu   
23
Atomic Volume
15.00 cm3/mol   
34
19.90 cm3/mol   
20
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Actinium
  
Next Element
Uranium
  
Protactinium
  
Valence Electron Potential
92.00 (-eV)   
11
59.30 (-eV)   
23
Lattice Constant
392.50 pm   
23
508.42 pm   
14
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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