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Atomic Structure of Promethium and Actinium


Atomic Structure of Actinium and Promethium


Atomic Properties

Atomic Number
61   
99+
89   
29

Electron Configuration
[Xe] 4f5 6s2   
[Rn] 6d1 7s2   

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

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

Atom
  
  

Number of Protons
61   
99+
89   
29

Number of Neutrons
84   
40
138   
16

Number of Electrons
61   
99+
89   
29

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
195.00 pm   
7

Covalent Radius
199.00 pm   
12
Not Available   

Van der Waals Radius
236.00 pm   
16
Not Available   

Atomic Weight
145.00 amu   
99+
227.00 amu   
25

Atomic Volume
22.39 cm3/mol   
12
22.54 cm3/mol   
11

Adjacent Atomic Numbers
  
  

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Neodymium
  
Radium
  

Next Element
Samarium
  
Thorium
  

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

Lattice Constant
Not Available   
567.00 pm   
8

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

Lattice C/A Ratio
Not Available   
Not Available   

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