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Atomic Structure of Francium and Promethium


Atomic Structure of Promethium and Francium


Atomic Properties

Atomic Number
87   
31
61   
99+

Electron Configuration
[Rn] 7s1   
[Xe] 4f5 6s2   

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

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

Atom
  
  

Number of Protons
87   
31
61   
99+

Number of Neutrons
136   
17
84   
40

Number of Electrons
87   
31
61   
99+

Radius of an Atom
  
  

Atomic Radius
Not Available   
183.00 pm   
10

Covalent Radius
260.00 pm   
1
199.00 pm   
12

Van der Waals Radius
348.00 pm   
1
236.00 pm   
16

Atomic Weight
223.00 amu   
27
145.00 amu   
99+

Atomic Volume
Not Available   
22.39 cm3/mol   
12

Adjacent Atomic Numbers
  
  

Previous Element
Polonium
  
Neodymium
  

Next Element
Radium
  
Samarium
  

Valence Electron Potential
8.00 (-eV)   
99+
44.10 (-eV)   
39

Lattice Constant
Not Available   
Not Available   

Lattice Angles
NA   
Unknown   

Lattice C/A Ratio
Not Available   
Not Available   

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