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Atomic Structure of Lanthanum and Francium

Lanthanum
Francium
Atomic Structure of Francium and Lanthanum


Atomic Properties
Atomic Number
57   
99+
87   
31
Electron Configuration
[Xe] 5d2 6s2   
[Rn] 7s1   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
57   
99+
87   
31
Number of Neutrons
82   
99+
136   
17
Number of Electrons
57   
99+
87   
31
Radius of an Atom
  
  
Atomic Radius
187.00 pm   
8
Not Available   
Covalent Radius
207.00 pm   
6
260.00 pm   
1
Van der Waals Radius
240.00 pm   
13
348.00 pm   
1
Atomic Weight
138.91 amu   
99+
223.00 amu   
27
Atomic Volume
20.73 cm3/mol   
16
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Barium
  
Polonium
  
Next Element
Cerium
  
Radium
  
Valence Electron Potential
40.71 (-eV)   
99+
8.00 (-eV)   
99+
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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