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Atomic Structure of Thallium and Barium


Atomic Structure of Barium and Thallium


Atomic Properties

Atomic Number
81   
35
56   
99+

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

Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
81   
35
56   
99+

Number of Neutrons
123   
20
81   
99+

Number of Electrons
81   
35
56   
99+

Radius of an Atom
  
  

Atomic Radius
170.00 pm   
22
222.00 pm   
4

Covalent Radius
145.00 pm   
39
215.00 pm   
5

Van der Waals Radius
196.00 pm   
30
268.00 pm   
6

Atomic Weight
204.38 amu   
31
137.33 amu   
99+

Atomic Volume
17.20 cm3/mol   
31
39.24 cm3/mol   
5

Adjacent Atomic Numbers
  
  

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Mercury
  
Cesium
  

Next Element
Lead
  
Lanthanum
  

Valence Electron Potential
9.60 (-eV)   
99+
21.30 (-eV)   
99+

Lattice Constant
345.66 pm   
99+
502.80 pm   
15

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

Lattice C/A Ratio
1.60   
6
Not Available   

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