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Atomic Structure of Cesium and Lanthanum


Atomic Structure of Lanthanum and Cesium


Atomic Properties

Atomic Number
55   
99+
57   
99+

Electron Configuration
[Xe] 6s1   
[Xe] 5d2 6s2   

Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   

Atom
  
  

Number of Protons
55   
99+
57   
99+

Number of Neutrons
78   
99+
82   
99+

Number of Electrons
55   
99+
57   
99+

Radius of an Atom
  
  

Atomic Radius
265.00 pm   
1
187.00 pm   
8

Covalent Radius
244.00 pm   
2
207.00 pm   
6

Van der Waals Radius
343.00 pm   
2
240.00 pm   
13

Atomic Weight
132.91 amu   
99+
138.91 amu   
99+

Atomic Volume
71.07 cm3/mol   
1
20.73 cm3/mol   
16

Adjacent Atomic Numbers
  
  

Previous Element
Tin
  
Barium
  

Next Element
Barium
  
Cerium
  

Valence Electron Potential
8.62 (-eV)   
99+
40.71 (-eV)   
99+

Lattice Constant
614.10 pm   
5
377.20 pm   
28

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

Lattice C/A Ratio
Not Available   
1.62   
2

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