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Atomic Structure of Protactinium and Holmium

Protactinium
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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