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Atomic Structure of Protactinium and Neptunium

Protactinium
Neptunium
Atomic Structure of Neptunium and Protactinium


Atomic Properties
Atomic Number
91   
27
93   
25
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Rn] 5f4 6d1 7s2   
Crystal Structure
Tetragonal (TETR)   
Orthorhombic (ORTH)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
ORTH-Crystal-Structure-of-Neptunium.jpg#100   
Atom
  
  
Number of Protons
91   
27
93   
25
Number of Neutrons
122   
21
144   
14
Number of Electrons
91   
27
93   
25
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
155.00 pm   
30
Covalent Radius
200.00 pm   
11
190.00 pm   
18
Van der Waals Radius
243.00 pm   
11
221.00 pm   
22
Atomic Weight
231.04 amu   
24
237.00 amu   
22
Atomic Volume
15.00 cm3/mol   
34
11.62 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Uranium
  
Next Element
Uranium
  
Plutonium
  
Valence Electron Potential
92.00 (-eV)   
11
96.00 (-eV)   
9
Lattice Constant
392.50 pm   
23
666.30 pm   
3
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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