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Atomic Structure of Praseodymium and Actinium

Praseodymium
Actinium
Atomic Structure of Actinium and Praseodymium


Atomic Properties
Atomic Number
59   
99+
89   
29
Electron Configuration
[Xe] 4f3 6s2   
[Rn] 6d1 7s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100   
FCC-Crystal-Structure-of-Actinium.jpg#100   
Atom
  
  
Number of Protons
59   
99+
89   
29
Number of Neutrons
82   
99+
138   
16
Number of Electrons
59   
99+
89   
29
Radius of an Atom
  
  
Atomic Radius
182.00 pm   
11
195.00 pm   
7
Covalent Radius
203.00 pm   
9
Not Available   
Van der Waals Radius
239.00 pm   
14
Not Available   
Atomic Weight
140.91 amu   
99+
227.00 amu   
25
Atomic Volume
20.80 cm3/mol   
15
22.54 cm3/mol   
11
Adjacent Atomic Numbers
  
  
Previous Element
Cerium
  
Radium
  
Next Element
Neodymium
  
Thorium
  
Valence Electron Potential
42.64 (-eV)   
99+
38.60 (-eV)   
99+
Lattice Constant
367.25 pm   
29
567.00 pm   
8
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.61   
4
Not Available   
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