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Atomic Structure of Lanthanum and Europium

Lanthanum
Europium
Atomic Structure of Europium and Lanthanum


Atomic Properties
Atomic Number
57   
99+
63   
99+
Electron Configuration
[Xe] 5d2 6s2   
[Xe] 4f7 6s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
57   
99+
63   
99+
Number of Neutrons
82   
99+
89   
38
Number of Electrons
57   
99+
63   
99+
Radius of an Atom
  
  
Atomic Radius
187.00 pm   
8
180.00 pm   
14
Covalent Radius
207.00 pm   
6
198.00 pm   
13
Van der Waals Radius
240.00 pm   
13
233.00 pm   
18
Atomic Weight
138.91 amu   
99+
151.96 amu   
99+
Atomic Volume
20.73 cm3/mol   
16
28.90 cm3/mol   
8
Adjacent Atomic Numbers
  
  
Previous Element
Barium
  
Samarium
  
Next Element
Cerium
  
Gadolinium
  
Valence Electron Potential
40.71 (-eV)   
99+
45.60 (-eV)   
35
Lattice Constant
377.20 pm   
28
458.10 pm   
17
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.62   
2
Not Available   
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