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Atomic Structure of Thallium and Beryllium

Thallium
Beryllium
Atomic Structure of Beryllium and Thallium


Atomic Properties
Atomic Number
81   
35
4   
99+
Electron Configuration
[Xe] 4f14 5d10 6s2 6p1   
[He] 2s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Beryllium.jpg#100   
Atom
  
  
Number of Protons
81   
35
4   
99+
Number of Neutrons
123   
20
5   
99+
Number of Electrons
81   
35
4   
99+
Radius of an Atom
  
  
Atomic Radius
170.00 pm   
22
112.00 pm   
99+
Covalent Radius
145.00 pm   
39
96.00 pm   
99+
Van der Waals Radius
196.00 pm   
30
153.00 pm   
99+
Atomic Weight
204.38 amu   
31
9.01 amu   
99+
Atomic Volume
17.20 cm3/mol   
31
5.00 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Mercury
  
Lithium
  
Next Element
Lead
  
Sodium
  
Valence Electron Potential
9.60 (-eV)   
99+
82.00 (-eV)   
15
Lattice Constant
345.66 pm   
99+
228.58 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.60   
6
1.57   
18
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