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Atomic Structure of Lanthanum and Beryllium

Lanthanum
Beryllium
Atomic Structure of Beryllium and Lanthanum


Atomic Properties
Atomic Number
57   
99+
4   
99+
Electron Configuration
[Xe] 5d2 6s2   
[He] 2s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
HCP-Crystal-Structure-of-Beryllium.jpg#100   
Atom
  
  
Number of Protons
57   
99+
4   
99+
Number of Neutrons
82   
99+
5   
99+
Number of Electrons
57   
99+
4   
99+
Radius of an Atom
  
  
Atomic Radius
187.00 pm   
8
112.00 pm   
99+
Covalent Radius
207.00 pm   
6
96.00 pm   
99+
Van der Waals Radius
240.00 pm   
13
153.00 pm   
99+
Atomic Weight
138.91 amu   
99+
9.01 amu   
99+
Atomic Volume
20.73 cm3/mol   
16
5.00 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
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Barium
  
Lithium
  
Next Element
Cerium
  
Sodium
  
Valence Electron Potential
40.71 (-eV)   
99+
82.00 (-eV)   
15
Lattice Constant
377.20 pm   
28
228.58 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.62   
2
1.57   
18
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