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Atomic Structure of Lanthanum and Fermium


Atomic Structure of Fermium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
100   
18

Electron Configuration
[Xe] 5d2 6s2   
[Rn] 5f12 7s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Not Known   

Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
Unknown-Crystal-Structure-of-Fermium.jpg#100   

Atom
  
  

Number of Protons
57   
99+
100   
18

Number of Neutrons
82   
99+
157   
7

Number of Electrons
57   
99+
100   
18

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
Not Available   

Covalent Radius
207.00 pm   
6
Not Available   

Van der Waals Radius
240.00 pm   
13
245.00 pm   
9

Atomic Weight
138.91 amu   
99+
257.00 amu   
15

Atomic Volume
20.73 cm3/mol   
16
Not Available   

Adjacent Atomic Numbers
  
  

Previous Element
Barium
  

Next Element
Cerium
  

Valence Electron Potential
40.71 (-eV)   
99+
Not Available   

Lattice Constant
377.20 pm   
28
Not Available   

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

Lattice C/A Ratio
1.62   
2
Not Available   

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