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Atomic Structure of Samarium and Thallium

Samarium
Thallium
Atomic Structure of Thallium and Samarium


Atomic Properties
Atomic Number
62   
99+
81   
35
Electron Configuration
[Xe] 4f6 6s2   
[Xe] 4f14 5d10 6s2 6p1   
Crystal Structure
Rhombohedral (RHO)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
62   
99+
81   
35
Number of Neutrons
88   
39
123   
20
Number of Electrons
62   
99+
81   
35
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
170.00 pm   
22
Covalent Radius
198.00 pm   
13
145.00 pm   
39
Van der Waals Radius
229.00 pm   
20
196.00 pm   
30
Atomic Weight
150.36 amu   
99+
204.38 amu   
31
Atomic Volume
19.95 cm3/mol   
19
17.20 cm3/mol   
31
Adjacent Atomic Numbers
  
  
Previous Element
Promethium
  
Mercury
  
Next Element
Europium
  
Lead
  
Valence Electron Potential
44.80 (-eV)   
37
9.60 (-eV)   
99+
Lattice Constant
362.10 pm   
33
345.66 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.60   
6
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