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Atomic Structure of Promethium and Fermium


Atomic Structure of Fermium and Promethium


Atomic Properties

Atomic Number
61   
99+
100   
18

Electron Configuration
[Xe] 4f5 6s2   
[Rn] 5f12 7s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Not Known   

Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Unknown-Crystal-Structure-of-Fermium.jpg#100   

Atom
  
  

Number of Protons
61   
99+
100   
18

Number of Neutrons
84   
40
157   
7

Number of Electrons
61   
99+
100   
18

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
Not Available   

Covalent Radius
199.00 pm   
12
Not Available   

Van der Waals Radius
236.00 pm   
16
245.00 pm   
9

Atomic Weight
145.00 amu   
99+
257.00 amu   
15

Atomic Volume
22.39 cm3/mol   
12
Not Available   

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  

Next Element
Samarium
  

Valence Electron Potential
44.10 (-eV)   
39
Not Available   

Lattice Constant
Not Available   
Not Available   

Lattice Angles
Unknown   
NA   

Lattice C/A Ratio
Not Available   
Not Available   

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