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Atomic Structure of Protactinium and 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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