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Atomic Structure of Cesium and Protactinium

Cesium
Protactinium
Atomic Structure of Protactinium and Cesium


Atomic Properties
Atomic Number
55   
99+
91   
27
Electron Configuration
[Xe] 6s1   
[Rn] 5f2 6d1 7s2   
Crystal Structure
Body Centered Cubic (BCC)   
Tetragonal (TETR)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
TETR-Crystal-Structure-of-Protactinium.jpg#100   
Atom
  
  
Number of Protons
55   
99+
91   
27
Number of Neutrons
78   
99+
122   
21
Number of Electrons
55   
99+
91   
27
Radius of an Atom
  
  
Atomic Radius
265.00 pm   
1
163.00 pm   
25
Covalent Radius
244.00 pm   
2
200.00 pm   
11
Van der Waals Radius
343.00 pm   
2
243.00 pm   
11
Atomic Weight
132.91 amu   
99+
231.04 amu   
24
Atomic Volume
71.07 cm3/mol   
1
15.00 cm3/mol   
34
Adjacent Atomic Numbers
  
  
Previous Element
Tin
  
Thorium
  
Next Element
Barium
  
Uranium
  
Valence Electron Potential
8.62 (-eV)   
99+
92.00 (-eV)   
11
Lattice Constant
614.10 pm   
5
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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