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Atomic Structure of Neptunium and Protactinium

Neptunium
Protactinium
Atomic Structure of Protactinium and Neptunium


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