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Atomic Structure of Barium and 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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