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Atomic Structure of Hafnium and Lanthanum

Hafnium
Lanthanum
Atomic Structure of Lanthanum and Hafnium


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