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Atomic Structure of Lanthanum and Hafnium

Lanthanum
Hafnium
Atomic Structure of Hafnium and Lanthanum


Atomic Properties
Atomic Number
57   
99+
72   
99+
Electron Configuration
[Xe] 5d2 6s2   
[Xe] 4f14 5d2 6s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
57   
99+
72   
99+
Number of Neutrons
82   
99+
106   
29
Number of Electrons
57   
99+
72   
99+
Radius of an Atom
  
  
Atomic Radius
187.00 pm   
8
159.00 pm   
28
Covalent Radius
207.00 pm   
6
175.00 pm   
23
Van der Waals Radius
240.00 pm   
13
200.00 pm   
28
Atomic Weight
138.91 amu   
99+
178.49 amu   
39
Atomic Volume
20.73 cm3/mol   
16
13.60 cm3/mol   
38
Adjacent Atomic Numbers
  
  
Previous Element
Barium
  
Lutetium
  
Next Element
Cerium
  
Tantalum
  
Valence Electron Potential
40.71 (-eV)   
99+
81.00 (-eV)   
16
Lattice Constant
377.20 pm   
28
319.64 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.62   
2
1.58   
12
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