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Atomic Structure of Barium and Lanthanum

Barium
Lanthanum
Atomic Structure of Lanthanum and Barium


Atomic Properties
Atomic Number
56   
99+
57   
99+
Electron Configuration
[Xe] 6s2   
[Xe] 5d2 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
Atom
  
  
Number of Protons
56   
99+
57   
99+
Number of Neutrons
81   
99+
82   
99+
Number of Electrons
56   
99+
57   
99+
Radius of an Atom
  
  
Atomic Radius
222.00 pm   
4
187.00 pm   
8
Covalent Radius
215.00 pm   
5
207.00 pm   
6
Van der Waals Radius
268.00 pm   
6
240.00 pm   
13
Atomic Weight
137.33 amu   
99+
138.91 amu   
99+
Atomic Volume
39.24 cm3/mol   
5
20.73 cm3/mol   
16
Adjacent Atomic Numbers
  
  
Previous Element
Cesium
  
Barium
  
Next Element
Lanthanum
  
Cerium
  
Valence Electron Potential
21.30 (-eV)   
99+
40.71 (-eV)   
99+
Lattice Constant
502.80 pm   
15
377.20 pm   
28
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.62   
2
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