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Atomic Structure of Protactinium and Barium

Protactinium
Barium
Atomic Structure of Barium and Protactinium


Atomic Properties
Atomic Number
91   
27
56   
99+
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Xe] 6s2   
Crystal Structure
Tetragonal (TETR)   
Body Centered Cubic (BCC)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
91   
27
56   
99+
Number of Neutrons
122   
21
81   
99+
Number of Electrons
91   
27
56   
99+
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
222.00 pm   
4
Covalent Radius
200.00 pm   
11
215.00 pm   
5
Van der Waals Radius
243.00 pm   
11
268.00 pm   
6
Atomic Weight
231.04 amu   
24
137.33 amu   
99+
Atomic Volume
15.00 cm3/mol   
34
39.24 cm3/mol   
5
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Cesium
  
Next Element
Uranium
  
Lanthanum
  
Valence Electron Potential
92.00 (-eV)   
11
21.30 (-eV)   
99+
Lattice Constant
392.50 pm   
23
502.80 pm   
15
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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