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Atomic Structure of Actinium and Protactinium


Atomic Structure of Protactinium and Actinium


Atomic Properties

Atomic Number
89   
29
91   
27

Electron Configuration
[Rn] 6d1 7s2   
[Rn] 5f2 6d1 7s2   

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

Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
TETR-Crystal-Structure-of-Protactinium.jpg#100   

Atom
  
  

Number of Protons
89   
29
91   
27

Number of Neutrons
138   
16
122   
21

Number of Electrons
89   
29
91   
27

Radius of an Atom
  
  

Atomic Radius
195.00 pm   
7
163.00 pm   
25

Covalent Radius
Not Available   
200.00 pm   
11

Van der Waals Radius
Not Available   
243.00 pm   
11

Atomic Weight
227.00 amu   
25
231.04 amu   
24

Atomic Volume
22.54 cm3/mol   
11
15.00 cm3/mol   
34

Adjacent Atomic Numbers
  
  

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Thorium
  

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Thorium
  
Uranium
  

Valence Electron Potential
38.60 (-eV)   
99+
92.00 (-eV)   
11

Lattice Constant
567.00 pm   
8
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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