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Atomic Structure of Holmium and Promethium


Atomic Structure of Promethium and Holmium


Atomic Properties

Atomic Number
67   
99+
61   
99+

Electron Configuration
[Xe] 4f11 6s2   
[Xe] 4f5 6s2   

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

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

Atom
  
  

Number of Protons
67   
99+
61   
99+

Number of Neutrons
98   
34
84   
40

Number of Electrons
67   
99+
61   
99+

Radius of an Atom
  
  

Atomic Radius
176.00 pm   
18
183.00 pm   
10

Covalent Radius
192.00 pm   
17
199.00 pm   
12

Van der Waals Radius
216.00 pm   
24
236.00 pm   
16

Atomic Weight
164.93 amu   
99+
145.00 amu   
99+

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

Adjacent Atomic Numbers
  
  

Previous Element
Dysprosium
  
Neodymium
  

Next Element
Erbium
  
Samarium
  

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

Lattice Constant
357.73 pm   
38
Not Available   

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

Lattice C/A Ratio
1.57   
17
Not Available   

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