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Atomic Structure of Promethium and Europium

Promethium
Europium
Atomic Structure of Europium and Promethium


Atomic Properties
Atomic Number
61   
99+
63   
99+
Electron Configuration
[Xe] 4f5 6s2   
[Xe] 4f7 6s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
61   
99+
63   
99+
Number of Neutrons
84   
40
89   
38
Number of Electrons
61   
99+
63   
99+
Radius of an Atom
  
  
Atomic Radius
183.00 pm   
10
180.00 pm   
14
Covalent Radius
199.00 pm   
12
198.00 pm   
13
Van der Waals Radius
236.00 pm   
16
233.00 pm   
18
Atomic Weight
145.00 amu   
99+
151.96 amu   
99+
Atomic Volume
22.39 cm3/mol   
12
28.90 cm3/mol   
8
Adjacent Atomic Numbers
  
  
Previous Element
Neodymium
  
Samarium
  
Next Element
Samarium
  
Gadolinium
  
Valence Electron Potential
44.10 (-eV)   
39
45.60 (-eV)   
35
Lattice Constant
Not Available   
458.10 pm   
17
Lattice Angles
Unknown   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
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