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Atomic Structure of Promethium and Hafnium

Promethium
Hafnium
Atomic Structure of Hafnium and Promethium


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