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Atomic Structure of Thorium and 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
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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