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Atomic Structure of Promethium and Radium

Promethium
Radium
Atomic Structure of Radium and Promethium


Atomic Properties
Atomic Number
61   
99+
88   
30
Electron Configuration
[Xe] 4f5 6s2   
[Rn] 7s2   
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+
88   
30
Number of Neutrons
84   
40
138   
16
Number of Electrons
61   
99+
88   
30
Radius of an Atom
  
  
Atomic Radius
183.00 pm   
10
Not Available   
Covalent Radius
199.00 pm   
12
221.00 pm   
3
Van der Waals Radius
236.00 pm   
16
283.00 pm   
4
Atomic Weight
145.00 amu   
99+
226.00 amu   
26
Atomic Volume
22.39 cm3/mol   
12
45.20 cm3/mol   
4
Adjacent Atomic Numbers
  
  
Previous Element
Neodymium
  
Francium
  
Next Element
Samarium
  
Actinium
  
Valence Electron Potential
44.10 (-eV)   
39
20.10 (-eV)   
99+
Lattice Constant
Not Available   
514.80 pm   
13
Lattice Angles
Unknown   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
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