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Atomic Structure of Einsteinium and Promethium


Atomic Structure of Promethium and Einsteinium


Atomic Properties

Atomic Number
99   
19
61   
99+

Electron Configuration
[Rn] 5f11 7s2   
[Xe] 4f5 6s2   

Crystal Structure
Face Centered Cubic (FCC)   
Double Hexagonal Close Packed (DHCP)   

Crystal Lattice
FCC-Crystal-Structure-of-Einsteinium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   

Atom
  
  

Number of Protons
99   
19
61   
99+

Number of Neutrons
153   
9
84   
40

Number of Electrons
99   
19
61   
99+

Radius of an Atom
  
  

Atomic Radius
186.00 pm   
9
183.00 pm   
10

Covalent Radius
Not Available   
199.00 pm   
12

Van der Waals Radius
Not Available   
236.00 pm   
16

Atomic Weight
252.00 amu   
16
145.00 amu   
99+

Atomic Volume
Not Available   
22.39 cm3/mol   
12

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  

Next Element
Fermium
  
Samarium
  

Valence Electron Potential
Not Available   
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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