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Atomic Structure of Lanthanum and Polonium


Atomic Structure of Polonium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
84   
32

Electron Configuration
[Xe] 5d2 6s2   
[Xe] 4f14 5d10 6s2 6p4   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Monoclinic (MON)   

Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
MON-Crystal-Structure-of-Polonium.jpg#100   

Atom
  
  

Number of Protons
57   
99+
84   
32

Number of Neutrons
82   
99+
125   
19

Number of Electrons
57   
99+
84   
32

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
168.00 pm   
23

Covalent Radius
207.00 pm   
6
140.00 pm   
99+

Van der Waals Radius
240.00 pm   
13
197.00 pm   
29

Atomic Weight
138.91 amu   
99+
209.00 amu   
28

Atomic Volume
20.73 cm3/mol   
16
22.23 cm3/mol   
13

Adjacent Atomic Numbers
  
  

Previous Element
Barium
  
Bismuth
  

Next Element
Cerium
  
Francium
  

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

Lattice Constant
377.20 pm   
28
335.90 pm   
99+

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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