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Atomic Structure of Lanthanum and 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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