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Atomic Structure of Thallium and Samarium


Atomic Structure of Samarium and Thallium


Atomic Properties

Atomic Number
81   
35
62   
99+

Electron Configuration
[Xe] 4f14 5d10 6s2 6p1   
[Xe] 4f6 6s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Rhombohedral (RHO)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   

Atom
  
  

Number of Protons
81   
35
62   
99+

Number of Neutrons
123   
20
88   
39

Number of Electrons
81   
35
62   
99+

Radius of an Atom
  
  

Atomic Radius
170.00 pm   
22
180.00 pm   
14

Covalent Radius
145.00 pm   
39
198.00 pm   
13

Van der Waals Radius
196.00 pm   
30
229.00 pm   
20

Atomic Weight
204.38 amu   
31
150.36 amu   
99+

Atomic Volume
17.20 cm3/mol   
31
19.95 cm3/mol   
19

Adjacent Atomic Numbers
  
  

Previous Element
Mercury
  
Promethium
  

Next Element
Lead
  
Europium
  

Valence Electron Potential
9.60 (-eV)   
99+
44.80 (-eV)   
37

Lattice Constant
345.66 pm   
99+
362.10 pm   
33

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

Lattice C/A Ratio
1.60   
6
Not Available   

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