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Atomic Structure of Promethium and Polonium


Atomic Structure of Polonium and Promethium


Atomic Properties

Atomic Number
61   
99+
84   
32

Electron Configuration
[Xe] 4f5 6s2   
[Xe] 4f14 5d10 6s2 6p4   

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

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

Atom
  
  

Number of Protons
61   
99+
84   
32

Number of Neutrons
84   
40
125   
19

Number of Electrons
61   
99+
84   
32

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
168.00 pm   
23

Covalent Radius
199.00 pm   
12
140.00 pm   
99+

Van der Waals Radius
236.00 pm   
16
197.00 pm   
29

Atomic Weight
145.00 amu   
99+
209.00 amu   
28

Atomic Volume
22.39 cm3/mol   
12
22.23 cm3/mol   
13

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  
Bismuth
  

Next Element
Samarium
  
Francium
  

Valence Electron Potential
44.10 (-eV)   
39
Not Available   

Lattice Constant
Not Available   
335.90 pm   
99+

Lattice Angles
Unknown   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

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