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Atomic Structure of Lutetium and Promethium


Atomic Structure of Promethium and Lutetium


Atomic Properties

Atomic Number
71   
99+
61   
99+

Electron Configuration
[Xe] 6s2 4f14 5d1   
[Xe] 4f5 6s2   

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

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   

Atom
  
  

Number of Protons
71   
99+
61   
99+

Number of Neutrons
104   
30
84   
40

Number of Electrons
71   
99+
61   
99+

Radius of an Atom
  
  

Atomic Radius
174.00 pm   
20
183.00 pm   
10

Covalent Radius
187.00 pm   
20
199.00 pm   
12

Van der Waals Radius
221.00 pm   
22
236.00 pm   
16

Atomic Weight
174.97 amu   
40
145.00 amu   
99+

Atomic Volume
17.78 cm3/mol   
30
22.39 cm3/mol   
12

Adjacent Atomic Numbers
  
  

Previous Element
Ytterbium
  
Neodymium
  

Next Element
Hafnium
  
Samarium
  

Valence Electron Potential
50.90 (-eV)   
26
44.10 (-eV)   
39

Lattice Constant
350.31 pm   
99+
Not Available   

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

Lattice C/A Ratio
1.59   
10
Not Available   

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