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Atomic Structure of Hafnium and Tantalum


Atomic Structure of Tantalum and Hafnium


Atomic Properties

Atomic Number
72   
99+
73   
99+

Electron Configuration
[Xe] 4f14 5d2 6s2   
[Xe] 4f14 5d3 6s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
72   
99+
73   
99+

Number of Neutrons
106   
29
108   
28

Number of Electrons
72   
99+
73   
99+

Radius of an Atom
  
  

Atomic Radius
159.00 pm   
28
146.00 pm   
35

Covalent Radius
175.00 pm   
23
170.00 pm   
25

Van der Waals Radius
200.00 pm   
28
200.00 pm   
28

Atomic Weight
178.49 amu   
39
180.95 amu   
38

Atomic Volume
13.60 cm3/mol   
38
10.90 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Lutetium
  
Hafnium
  

Next Element
Tantalum
  
Tungsten
  

Valence Electron Potential
81.00 (-eV)   
16
110.00 (-eV)   
7

Lattice Constant
319.64 pm   
99+
330.13 pm   
99+

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   

Lattice C/A Ratio
1.58   
12
Not Available   

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