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Atomic Structure of Samarium and Actinium

Samarium
Actinium
Atomic Structure of Actinium and Samarium


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