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Atomic Structure of Thorium and Hafnium


Atomic Structure of Hafnium and Thorium


Atomic Properties

Atomic Number
90   
28
72   
99+

Electron Configuration
[Rn] 6d2 7s2   
[Xe] 4f14 5d2 6s2   

Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
90   
28
72   
99+

Number of Neutrons
142   
15
106   
29

Number of Electrons
90   
28
72   
99+

Radius of an Atom
  
  

Atomic Radius
179.80 pm   
15
159.00 pm   
28

Covalent Radius
206.00 pm   
7
175.00 pm   
23

Van der Waals Radius
237.00 pm   
15
200.00 pm   
28

Atomic Weight
232.04 amu   
23
178.49 amu   
39

Atomic Volume
19.90 cm3/mol   
20
13.60 cm3/mol   
38

Adjacent Atomic Numbers
  
  

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Lutetium
  

Next Element
Tantalum
  

Valence Electron Potential
59.30 (-eV)   
23
81.00 (-eV)   
16

Lattice Constant
508.42 pm   
14
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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