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Atomic Structure of Lanthanum and Thorium


Atomic Structure of Thorium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
90   
28

Electron Configuration
[Xe] 5d2 6s2   
[Rn] 6d2 7s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
FCC-Crystal-Structure-of-Thorium.jpg#100   

Atom
  
  

Number of Protons
57   
99+
90   
28

Number of Neutrons
82   
99+
142   
15

Number of Electrons
57   
99+
90   
28

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
179.80 pm   
15

Covalent Radius
207.00 pm   
6
206.00 pm   
7

Van der Waals Radius
240.00 pm   
13
237.00 pm   
15

Atomic Weight
138.91 amu   
99+
232.04 amu   
23

Atomic Volume
20.73 cm3/mol   
16
19.90 cm3/mol   
20

Adjacent Atomic Numbers
  
  

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Barium
  
Actinium
  

Next Element
Cerium
  

Valence Electron Potential
40.71 (-eV)   
99+
59.30 (-eV)   
23

Lattice Constant
377.20 pm   
28
508.42 pm   
14

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

Lattice C/A Ratio
1.62   
2
Not Available   

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