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Atomic Structure of Cerium and Promethium

Cerium
Promethium
Atomic Structure of Promethium and Cerium


Atomic Properties
Atomic Number
58   
99+
61   
99+
Electron Configuration
[Xe] 4f1 5d1 6s2   
[Xe] 4f5 6s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
DHCP-Crystal-Structure-of-Cerium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
58   
99+
61   
99+
Number of Neutrons
82   
99+
84   
40
Number of Electrons
58   
99+
61   
99+
Radius of an Atom
  
  
Atomic Radius
181.80 pm   
12
183.00 pm   
10
Covalent Radius
204.00 pm   
8
199.00 pm   
12
Van der Waals Radius
235.00 pm   
17
236.00 pm   
16
Atomic Weight
140.12 amu   
99+
145.00 amu   
99+
Atomic Volume
20.67 cm3/mol   
17
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Lanthanum
  
Neodymium
  
Next Element
Praseodymium
  
Samarium
  
Valence Electron Potential
41.78 (-eV)   
99+
44.10 (-eV)   
39
Lattice Constant
362.00 pm   
34
Not Available   
Lattice Angles
π/2, π/2, 2 π/3   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
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