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Atomic Structure of Thorium and Erbium

Thorium
Erbium
Atomic Structure of Erbium and Thorium


Atomic Properties
Atomic Number
90   
28
68   
99+
Electron Configuration
[Rn] 6d2 7s2   
[Xe] 4f12 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
HCP-Crystal-Structure-of-Erbium.jpg#100   
Atom
  
  
Number of Protons
90   
28
68   
99+
Number of Neutrons
142   
15
99   
33
Number of Electrons
90   
28
68   
99+
Radius of an Atom
  
  
Atomic Radius
179.80 pm   
15
176.00 pm   
18
Covalent Radius
206.00 pm   
7
189.00 pm   
19
Van der Waals Radius
237.00 pm   
15
Not Available   
Atomic Weight
232.04 amu   
23
167.26 amu   
99+
Atomic Volume
19.90 cm3/mol   
20
18.40 cm3/mol   
25
Adjacent Atomic Numbers
  
  
Previous Element
Actinium
  
Holmium
  
Next Element
Protactinium
  
Thulium
  
Valence Electron Potential
59.30 (-eV)   
23
49.00 (-eV)   
29
Lattice Constant
508.42 pm   
14
355.88 pm   
39
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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