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Atomic Structure of Thorium and Holmium


Atomic Structure of Holmium and Thorium


Atomic Properties

Atomic Number
90   
28
67   
99+

Electron Configuration
[Rn] 6d2 7s2   
[Xe] 4f11 6s2   

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

Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
HCP-Crystal-Structure-of-Holmium.jpg#100   

Atom
  
  

Number of Protons
90   
28
67   
99+

Number of Neutrons
142   
15
98   
34

Number of Electrons
90   
28
67   
99+

Radius of an Atom
  
  

Atomic Radius
179.80 pm   
15
176.00 pm   
18

Covalent Radius
206.00 pm   
7
192.00 pm   
17

Van der Waals Radius
237.00 pm   
15
216.00 pm   
24

Atomic Weight
232.04 amu   
23
164.93 amu   
99+

Atomic Volume
19.90 cm3/mol   
20
18.70 cm3/mol   
24

Adjacent Atomic Numbers
  
  

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Valence Electron Potential
59.30 (-eV)   
23
47.90 (-eV)   
31

Lattice Constant
508.42 pm   
14
357.73 pm   
38

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

Lattice C/A Ratio
Not Available   
1.57   
17

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