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Atomic Structure of Samarium and Protactinium

Samarium
Protactinium
Atomic Structure of Protactinium and Samarium


Atomic Properties
Atomic Number
62   
99+
91   
27
Electron Configuration
[Xe] 4f6 6s2   
[Rn] 5f2 6d1 7s2   
Crystal Structure
Rhombohedral (RHO)   
Tetragonal (TETR)   
Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100   
TETR-Crystal-Structure-of-Protactinium.jpg#100   
Atom
  
  
Number of Protons
62   
99+
91   
27
Number of Neutrons
88   
39
122   
21
Number of Electrons
62   
99+
91   
27
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
163.00 pm   
25
Covalent Radius
198.00 pm   
13
200.00 pm   
11
Van der Waals Radius
229.00 pm   
20
243.00 pm   
11
Atomic Weight
150.36 amu   
99+
231.04 amu   
24
Atomic Volume
19.95 cm3/mol   
19
15.00 cm3/mol   
34
Adjacent Atomic Numbers
  
  
Previous Element
Promethium
  
Thorium
  
Next Element
Europium
  
Uranium
  
Valence Electron Potential
44.80 (-eV)   
37
92.00 (-eV)   
11
Lattice Constant
362.10 pm   
33
392.50 pm   
23
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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