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Atomic Structure of Actinium and Samarium

Actinium
Samarium
Atomic Structure of Samarium and Actinium


Atomic Properties
Atomic Number
89   
29
62   
99+
Electron Configuration
[Rn] 6d1 7s2   
[Xe] 4f6 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Rhombohedral (RHO)   
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   
Atom
  
  
Number of Protons
89   
29
62   
99+
Number of Neutrons
138   
16
88   
39
Number of Electrons
89   
29
62   
99+
Radius of an Atom
  
  
Atomic Radius
195.00 pm   
7
180.00 pm   
14
Covalent Radius
Not Available   
198.00 pm   
13
Van der Waals Radius
Not Available   
229.00 pm   
20
Atomic Weight
227.00 amu   
25
150.36 amu   
99+
Atomic Volume
22.54 cm3/mol   
11
19.95 cm3/mol   
19
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Promethium
  
Next Element
Thorium
  
Europium
  
Valence Electron Potential
38.60 (-eV)   
99+
44.80 (-eV)   
37
Lattice Constant
567.00 pm   
8
362.10 pm   
33
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
Not Available   
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