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Atomic Structure of Neptunium and Hafnium

Neptunium
Hafnium
Atomic Structure of Hafnium and Neptunium


Atomic Properties
Atomic Number
93   
25
72   
99+
Electron Configuration
[Rn] 5f4 6d1 7s2   
[Xe] 4f14 5d2 6s2   
Crystal Structure
Orthorhombic (ORTH)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
ORTH-Crystal-Structure-of-Neptunium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
93   
25
72   
99+
Number of Neutrons
144   
14
106   
29
Number of Electrons
93   
25
72   
99+
Radius of an Atom
  
  
Atomic Radius
155.00 pm   
30
159.00 pm   
28
Covalent Radius
190.00 pm   
18
175.00 pm   
23
Van der Waals Radius
221.00 pm   
22
200.00 pm   
28
Atomic Weight
237.00 amu   
22
178.49 amu   
39
Atomic Volume
11.62 cm3/mol   
99+
13.60 cm3/mol   
38
Adjacent Atomic Numbers
  
  
Previous Element
Uranium
  
Lutetium
  
Next Element
Plutonium
  
Tantalum
  
Valence Electron Potential
96.00 (-eV)   
9
81.00 (-eV)   
16
Lattice Constant
666.30 pm   
3
319.64 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.58   
12
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