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Atomic Structure of Protactinium and Holmium


Atomic Structure of Holmium and Protactinium


Atomic Properties

Atomic Number
91   
27
67   
99+

Electron Configuration
[Rn] 5f2 6d1 7s2   
[Xe] 4f11 6s2   

Crystal Structure
Tetragonal (TETR)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
HCP-Crystal-Structure-of-Holmium.jpg#100   

Atom
  
  

Number of Protons
91   
27
67   
99+

Number of Neutrons
122   
21
98   
34

Number of Electrons
91   
27
67   
99+

Radius of an Atom
  
  

Atomic Radius
163.00 pm   
25
176.00 pm   
18

Covalent Radius
200.00 pm   
11
192.00 pm   
17

Van der Waals Radius
243.00 pm   
11
216.00 pm   
24

Atomic Weight
231.04 amu   
24
164.93 amu   
99+

Atomic Volume
15.00 cm3/mol   
34
18.70 cm3/mol   
24

Adjacent Atomic Numbers
  
  

Previous Element
Thorium
  
Dysprosium
  

Next Element
Uranium
  
Erbium
  

Valence Electron Potential
92.00 (-eV)   
11
47.90 (-eV)   
31

Lattice Constant
392.50 pm   
23
357.73 pm   
38

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

Lattice C/A Ratio
Not Available   
1.57   
17

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