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Atomic Structure of Hafnium and Promethium

Hafnium
Promethium
Atomic Structure of Promethium and Hafnium


Atomic Properties
Atomic Number
72   
99+
61   
99+
Electron Configuration
[Xe] 4f14 5d2 6s2   
[Xe] 4f5 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
72   
99+
61   
99+
Number of Neutrons
106   
29
84   
40
Number of Electrons
72   
99+
61   
99+
Radius of an Atom
  
  
Atomic Radius
159.00 pm   
28
183.00 pm   
10
Covalent Radius
175.00 pm   
23
199.00 pm   
12
Van der Waals Radius
200.00 pm   
28
236.00 pm   
16
Atomic Weight
178.49 amu   
39
145.00 amu   
99+
Atomic Volume
13.60 cm3/mol   
38
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Lutetium
  
Neodymium
  
Next Element
Tantalum
  
Samarium
  
Valence Electron Potential
81.00 (-eV)   
16
44.10 (-eV)   
39
Lattice Constant
319.64 pm   
99+
Not Available   
Lattice Angles
π/2, π/2, 2 π/3   
Unknown   
Lattice C/A Ratio
1.58   
12
Not Available   
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