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Atomic Structure of Protactinium and Francium


Atomic Structure of Francium and Protactinium


Atomic Properties

Atomic Number
91   
27
87   
31

Electron Configuration
[Rn] 5f2 6d1 7s2   
[Rn] 7s1   

Crystal Structure
Tetragonal (TETR)   
Body Centered Cubic (BCC)   

Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
91   
27
87   
31

Number of Neutrons
122   
21
136   
17

Number of Electrons
91   
27
87   
31

Radius of an Atom
  
  

Atomic Radius
163.00 pm   
25
Not Available   

Covalent Radius
200.00 pm   
11
260.00 pm   
1

Van der Waals Radius
243.00 pm   
11
348.00 pm   
1

Atomic Weight
231.04 amu   
24
223.00 amu   
27

Atomic Volume
15.00 cm3/mol   
34
Not Available   

Adjacent Atomic Numbers
  
  

Previous Element
Thorium
  
Polonium
  

Next Element
Uranium
  
Radium
  

Valence Electron Potential
92.00 (-eV)   
11
8.00 (-eV)   
99+

Lattice Constant
392.50 pm   
23
Not Available   

Lattice Angles
π/2, π/2, π/2   
NA   

Lattice C/A Ratio
Not Available   
Not Available   

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