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Atomic Structure of Hafnium and Samarium

Hafnium
Samarium
Atomic Structure of Samarium and Hafnium


Atomic Properties
Atomic Number
72   
99+
62   
99+
Electron Configuration
[Xe] 4f14 5d2 6s2   
[Xe] 4f6 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Rhombohedral (RHO)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   
Atom
  
  
Number of Protons
72   
99+
62   
99+
Number of Neutrons
106   
29
88   
39
Number of Electrons
72   
99+
62   
99+
Radius of an Atom
  
  
Atomic Radius
159.00 pm   
28
180.00 pm   
14
Covalent Radius
175.00 pm   
23
198.00 pm   
13
Van der Waals Radius
200.00 pm   
28
229.00 pm   
20
Atomic Weight
178.49 amu   
39
150.36 amu   
99+
Atomic Volume
13.60 cm3/mol   
38
19.95 cm3/mol   
19
Adjacent Atomic Numbers
  
  
Previous Element
Lutetium
  
Promethium
  
Next Element
Tantalum
  
Europium
  
Valence Electron Potential
81.00 (-eV)   
16
44.80 (-eV)   
37
Lattice Constant
319.64 pm   
99+
362.10 pm   
33
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.58   
12
Not Available   
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