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Atomic Structure of Lanthanum and Praseodymium


Atomic Structure of Praseodymium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
59   
99+

Electron Configuration
[Xe] 5d2 6s2   
[Xe] 4f3 6s2   

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

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

Atom
  
  

Number of Protons
57   
99+
59   
99+

Number of Neutrons
82   
99+
82   
99+

Number of Electrons
57   
99+
59   
99+

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
182.00 pm   
11

Covalent Radius
207.00 pm   
6
203.00 pm   
9

Van der Waals Radius
240.00 pm   
13
239.00 pm   
14

Atomic Weight
138.91 amu   
99+
140.91 amu   
99+

Atomic Volume
20.73 cm3/mol   
16
20.80 cm3/mol   
15

Adjacent Atomic Numbers
  
  

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Barium
  
Cerium
  

Next Element
Cerium
  
Neodymium
  

Valence Electron Potential
40.71 (-eV)   
99+
42.64 (-eV)   
99+

Lattice Constant
377.20 pm   
28
367.25 pm   
29

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

Lattice C/A Ratio
1.62   
2
1.61   
4

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