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Atomic Structure of Beryllium and Lanthanum

Beryllium
Lanthanum
Atomic Structure of Lanthanum and Beryllium


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