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Atomic Structure of Actinium and Protactinium

Actinium
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
  
  
Previous Element
Radium
  
Thorium
  
Next Element
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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