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Atomic Structure of Samarium and Lanthanum


Atomic Structure of Lanthanum and Samarium


Atomic Properties

Atomic Number
62   
99+
57   
99+

Electron Configuration
[Xe] 4f6 6s2   
[Xe] 5d2 6s2   

Crystal Structure
Rhombohedral (RHO)   
Double Hexagonal Close Packed (DHCP)   

Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100   
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   

Atom
  
  

Number of Protons
62   
99+
57   
99+

Number of Neutrons
88   
39
82   
99+

Number of Electrons
62   
99+
57   
99+

Radius of an Atom
  
  

Atomic Radius
180.00 pm   
14
187.00 pm   
8

Covalent Radius
198.00 pm   
13
207.00 pm   
6

Van der Waals Radius
229.00 pm   
20
240.00 pm   
13

Atomic Weight
150.36 amu   
99+
138.91 amu   
99+

Atomic Volume
19.95 cm3/mol   
19
20.73 cm3/mol   
16

Adjacent Atomic Numbers
  
  

Previous Element
Promethium
  
Barium
  

Next Element
Europium
  
Cerium
  

Valence Electron Potential
44.80 (-eV)   
37
40.71 (-eV)   
99+

Lattice Constant
362.10 pm   
33
377.20 pm   
28

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
1.62   
2

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