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Atomic Structure of Thulium and Beryllium


Atomic Structure of Beryllium and Thulium


Atomic Properties

Atomic Number
69   
99+
4   
99+

Electron Configuration
[Xe] 4f13 6s2   
[He] 2s2   

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

Crystal Lattice
HCP-Crystal-Structure-of-Thulium.jpg#100   
HCP-Crystal-Structure-of-Beryllium.jpg#100   

Atom
  
  

Number of Protons
69   
99+
4   
99+

Number of Neutrons
100   
32
5   
99+

Number of Electrons
69   
99+
4   
99+

Radius of an Atom
  
  

Atomic Radius
176.00 pm   
18
112.00 pm   
99+

Covalent Radius
160.00 pm   
30
96.00 pm   
99+

Van der Waals Radius
Not Available   
153.00 pm   
99+

Atomic Weight
168.93 amu   
99+
9.01 amu   
99+

Atomic Volume
18.10 cm3/mol   
28
5.00 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Erbium
  
Lithium
  

Next Element
Ytterbium
  
Sodium
  

Valence Electron Potential
49.70 (-eV)   
28
82.00 (-eV)   
15

Lattice Constant
353.75 pm   
40
228.58 pm   
99+

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

Lattice C/A Ratio
1.57   
17
1.57   
18

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