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Atomic Structure of Barium and Thulium

Barium
Thulium
Atomic Structure of Thulium and Barium


Atomic Properties
Atomic Number
56   
99+
69   
99+
Electron Configuration
[Xe] 6s2   
[Xe] 4f13 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Thulium.jpg#100   
Atom
  
  
Number of Protons
56   
99+
69   
99+
Number of Neutrons
81   
99+
100   
32
Number of Electrons
56   
99+
69   
99+
Radius of an Atom
  
  
Atomic Radius
222.00 pm   
4
176.00 pm   
18
Covalent Radius
215.00 pm   
5
160.00 pm   
30
Van der Waals Radius
268.00 pm   
6
Not Available   
Atomic Weight
137.33 amu   
99+
168.93 amu   
99+
Atomic Volume
39.24 cm3/mol   
5
18.10 cm3/mol   
28
Adjacent Atomic Numbers
  
  
Previous Element
Cesium
  
Erbium
  
Next Element
Lanthanum
  
Ytterbium
  
Valence Electron Potential
21.30 (-eV)   
99+
49.70 (-eV)   
28
Lattice Constant
502.80 pm   
15
353.75 pm   
40
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.57   
17
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