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Atomic Structure of Thorium and Actinium


Atomic Structure of Actinium and Thorium


Atomic Properties

Atomic Number
90   
28
89   
29

Electron Configuration
[Rn] 6d2 7s2   
[Rn] 6d1 7s2   

Crystal Structure
Face Centered Cubic (FCC)   
Face Centered Cubic (FCC)   

Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
FCC-Crystal-Structure-of-Actinium.jpg#100   

Atom
  
  

Number of Protons
90   
28
89   
29

Number of Neutrons
142   
15
138   
16

Number of Electrons
90   
28
89   
29

Radius of an Atom
  
  

Atomic Radius
179.80 pm   
15
195.00 pm   
7

Covalent Radius
206.00 pm   
7
Not Available   

Van der Waals Radius
237.00 pm   
15
Not Available   

Atomic Weight
232.04 amu   
23
227.00 amu   
25

Atomic Volume
19.90 cm3/mol   
20
22.54 cm3/mol   
11

Adjacent Atomic Numbers
  
  

Previous Element
Actinium
  
Radium
  

Next Element
Thorium
  

Valence Electron Potential
59.30 (-eV)   
23
38.60 (-eV)   
99+

Lattice Constant
508.42 pm   
14
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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