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Atomic Structure of Protactinium and Osmium

Protactinium
Osmium
Atomic Structure of Osmium and Protactinium


Atomic Properties
Atomic Number
91   
27
76   
40
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Xe] 4f14 5d6 6s2   
Crystal Structure
Tetragonal (TETR)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
91   
27
76   
39
Number of Neutrons
122   
21
114   
25
Number of Electrons
91   
27
76   
39
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
133.80 pm   
99+
Covalent Radius
200.00 pm   
11
Not Available   
Van der Waals Radius
243.00 pm   
11
216.00 pm   
24
Atomic Weight
231.04 amu   
24
190.23 amu   
35
Atomic Volume
15.00 cm3/mol   
34
8.49 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Rhenium
  
Next Element
Uranium
  
Iridium
  
Valence Electron Potential
92.00 (-eV)   
11
91.40 (-eV)   
12
Lattice Constant
392.50 pm   
23
273.44 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.58   
14
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