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Atomic Structure of Protactinium and Radium

Protactinium
Radium
Atomic Structure of Radium and Protactinium


Atomic Properties
Atomic Number
91   
27
88   
30
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Rn] 7s2   
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
88   
30
Number of Neutrons
122   
21
138   
16
Number of Electrons
91   
27
88   
30
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
Not Available   
Covalent Radius
200.00 pm   
11
221.00 pm   
3
Van der Waals Radius
243.00 pm   
11
283.00 pm   
4
Atomic Weight
231.04 amu   
24
226.00 amu   
26
Atomic Volume
15.00 cm3/mol   
34
45.20 cm3/mol   
4
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Francium
  
Next Element
Uranium
  
Actinium
  
Valence Electron Potential
92.00 (-eV)   
11
20.10 (-eV)   
99+
Lattice Constant
392.50 pm   
23
514.80 pm   
13
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
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