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Atomic Structure of Actinium and Promethium

Actinium
Promethium
Atomic Structure of Promethium and Actinium


Atomic Properties
Atomic Number
89   
29
61   
99+
Electron Configuration
[Rn] 6d1 7s2   
[Xe] 4f5 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
89   
29
61   
99+
Number of Neutrons
138   
16
84   
40
Number of Electrons
89   
29
61   
99+
Radius of an Atom
  
  
Atomic Radius
195.00 pm   
7
183.00 pm   
10
Covalent Radius
Not Available   
199.00 pm   
12
Van der Waals Radius
Not Available   
236.00 pm   
16
Atomic Weight
227.00 amu   
25
145.00 amu   
99+
Atomic Volume
22.54 cm3/mol   
11
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Neodymium
  
Next Element
Thorium
  
Samarium
  
Valence Electron Potential
38.60 (-eV)   
99+
44.10 (-eV)   
39
Lattice Constant
567.00 pm   
8
Not Available   
Lattice Angles
π/2, π/2, π/2   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
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