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Atomic Structure of Protactinium and Actinium


Atomic Structure of Actinium and Protactinium


Atomic Properties

Atomic Number
91   
27
89   
29

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

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

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

Atom
  
  

Number of Protons
91   
27
89   
29

Number of Neutrons
122   
21
138   
16

Number of Electrons
91   
27
89   
29

Radius of an Atom
  
  

Atomic Radius
163.00 pm   
25
195.00 pm   
7

Covalent Radius
200.00 pm   
11
Not Available   

Van der Waals Radius
243.00 pm   
11
Not Available   

Atomic Weight
231.04 amu   
24
227.00 amu   
25

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

Adjacent Atomic Numbers
  
  

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Thorium
  
Radium
  

Next Element
Uranium
  
Thorium
  

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

Lattice Constant
392.50 pm   
23
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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