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Atomic Structure of Thorium and Protactinium

Thorium
Protactinium
Atomic Structure of Protactinium and Thorium


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