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Atomic Structure of Erbium and Thulium

Erbium
Thulium
Atomic Structure of Thulium and Erbium


Atomic Properties
Atomic Number
68   
99+
69   
99+
Electron Configuration
[Xe] 4f12 6s2   
[Xe] 4f13 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
HCP-Crystal-Structure-of-Erbium.jpg#100   
HCP-Crystal-Structure-of-Thulium.jpg#100   
Atom
  
  
Number of Protons
68   
99+
69   
99+
Number of Neutrons
99   
33
100   
32
Number of Electrons
68   
99+
69   
99+
Radius of an Atom
  
  
Atomic Radius
176.00 pm   
18
176.00 pm   
18
Covalent Radius
189.00 pm   
19
160.00 pm   
30
Atomic Weight
167.26 amu   
99+
168.93 amu   
99+
Atomic Volume
18.40 cm3/mol   
25
18.10 cm3/mol   
28
Adjacent Atomic Numbers
  
  
Previous Element
Holmium
  
Erbium
  
Next Element
Thulium
  
Ytterbium
  
Valence Electron Potential
49.00 (-eV)   
29
49.70 (-eV)   
28
Lattice Constant
355.88 pm   
39
353.75 pm   
40
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.57   
17
1.57   
17
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