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Atomic Structure of Promethium and Praseodymium


Atomic Structure of Praseodymium and Promethium


Atomic Properties

Atomic Number
61   
99+
59   
99+

Electron Configuration
[Xe] 4f5 6s2   
[Xe] 4f3 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100   
HCP-Crystal-Structure-of-Praseodymium.jpg#100   

Atom
  
  

Number of Protons
61   
99+
59   
99+

Number of Neutrons
84   
40
82   
99+

Number of Electrons
61   
99+
59   
99+

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
182.00 pm   
11

Covalent Radius
199.00 pm   
12
203.00 pm   
9

Van der Waals Radius
236.00 pm   
16
239.00 pm   
14

Atomic Weight
145.00 amu   
99+
140.91 amu   
99+

Atomic Volume
22.39 cm3/mol   
12
20.80 cm3/mol   
15

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  
Cerium
  

Next Element
Samarium
  
Neodymium
  

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

Lattice Constant
Not Available   
367.25 pm   
29

Lattice Angles
Unknown   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
1.61   
4

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