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Atomic Structure of Promethium and Holmium


Atomic Structure of Holmium and Promethium


Atomic Properties

Atomic Number
61   
99+
67   
99+

Electron Configuration
[Xe] 4f5 6s2   
[Xe] 4f11 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-Holmium.jpg#100   

Atom
  
  

Number of Protons
61   
99+
67   
99+

Number of Neutrons
84   
40
98   
34

Number of Electrons
61   
99+
67   
99+

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
176.00 pm   
18

Covalent Radius
199.00 pm   
12
192.00 pm   
17

Van der Waals Radius
236.00 pm   
16
216.00 pm   
24

Atomic Weight
145.00 amu   
99+
164.93 amu   
99+

Atomic Volume
22.39 cm3/mol   
12
18.70 cm3/mol   
24

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  
Dysprosium
  

Next Element
Samarium
  
Erbium
  

Valence Electron Potential
44.10 (-eV)   
39
47.90 (-eV)   
31

Lattice Constant
Not Available   
357.73 pm   
38

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

Lattice C/A Ratio
Not Available   
1.57   
17

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