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Atomic Structure of Barium and Promethium

Barium
Promethium
Atomic Structure of Promethium and Barium


Atomic Properties
Atomic Number
56   
99+
61   
99+
Electron Configuration
[Xe] 6s2   
[Xe] 4f5 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
56   
99+
61   
99+
Number of Neutrons
81   
99+
84   
40
Number of Electrons
56   
99+
61   
99+
Radius of an Atom
  
  
Atomic Radius
222.00 pm   
4
183.00 pm   
10
Covalent Radius
215.00 pm   
5
199.00 pm   
12
Van der Waals Radius
268.00 pm   
6
236.00 pm   
16
Atomic Weight
137.33 amu   
99+
145.00 amu   
99+
Atomic Volume
39.24 cm3/mol   
5
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Cesium
  
Neodymium
  
Next Element
Lanthanum
  
Samarium
  
Valence Electron Potential
21.30 (-eV)   
99+
44.10 (-eV)   
39
Lattice Constant
502.80 pm   
15
Not Available   
Lattice Angles
π/2, π/2, π/2   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
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