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Atomic Structure of Radium and Promethium

Radium
Promethium
Atomic Structure of Promethium and Radium


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