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Atomic Structure of Barium and Thulium


Atomic Structure of Thulium and Barium


Atomic Properties

Atomic Number
56   
99+
69   
99+

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

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

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

Atom
  
  

Number of Protons
56   
99+
69   
99+

Number of Neutrons
81   
99+
100   
32

Number of Electrons
56   
99+
69   
99+

Radius of an Atom
  
  

Atomic Radius
222.00 pm   
4
176.00 pm   
18

Covalent Radius
215.00 pm   
5
160.00 pm   
30

Van der Waals Radius
268.00 pm   
6
Not Available   

Atomic Weight
137.33 amu   
99+
168.93 amu   
99+

Atomic Volume
39.24 cm3/mol   
5
18.10 cm3/mol   
28

Adjacent Atomic Numbers
  
  

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Cesium
  
Erbium
  

Next Element
Lanthanum
  
Ytterbium
  

Valence Electron Potential
21.30 (-eV)   
99+
49.70 (-eV)   
28

Lattice Constant
502.80 pm   
15
353.75 pm   
40

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

Lattice C/A Ratio
Not Available   
1.57   
17

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