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Atomic Structure of Thallium and Erbium

Thallium
Erbium
Atomic Structure of Erbium and Thallium


Atomic Properties
Atomic Number
81   
35
68   
99+
Electron Configuration
[Xe] 4f14 5d10 6s2 6p1   
[Xe] 4f12 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Erbium.jpg#100   
Atom
  
  
Number of Protons
81   
35
68   
99+
Number of Neutrons
123   
20
99   
33
Number of Electrons
81   
35
68   
99+
Radius of an Atom
  
  
Atomic Radius
170.00 pm   
22
176.00 pm   
18
Covalent Radius
145.00 pm   
39
189.00 pm   
19
Van der Waals Radius
196.00 pm   
30
Not Available   
Atomic Weight
204.38 amu   
31
167.26 amu   
99+
Atomic Volume
17.20 cm3/mol   
31
18.40 cm3/mol   
25
Adjacent Atomic Numbers
  
  
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Mercury
  
Holmium
  
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Lead
  
Thulium
  
Valence Electron Potential
9.60 (-eV)   
99+
49.00 (-eV)   
29
Lattice Constant
345.66 pm   
99+
355.88 pm   
39
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.60   
6
1.57   
17
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