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Atomic Structure of Neptunium and Scandium


Atomic Structure of Scandium and Neptunium


Atomic Properties

Atomic Number
93   
25
21   
99+

Electron Configuration
[Rn] 5f4 6d1 7s2   
[Ar] 3d1 4s2   

Crystal Structure
Orthorhombic (ORTH)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
ORTH-Crystal-Structure-of-Neptunium.jpg#100   
HCP-Crystal-Structure-of-Scandium.jpg#100   

Atom
  
  

Number of Protons
93   
25
21   
99+

Number of Neutrons
144   
14
24   
99+

Number of Electrons
93   
25
21   
99+

Radius of an Atom
  
  

Atomic Radius
155.00 pm   
30
162.00 pm   
26

Covalent Radius
190.00 pm   
18
170.00 pm   
25

Van der Waals Radius
221.00 pm   
22
211.00 pm   
25

Atomic Weight
237.00 amu   
22
44.96 amu   
99+

Atomic Volume
11.62 cm3/mol   
99+
15.00 cm3/mol   
34

Adjacent Atomic Numbers
  
  

Previous Element
Uranium
  
Calcium
  

Next Element
Plutonium
  
Titanium
  

Valence Electron Potential
96.00 (-eV)   
9
58.00 (-eV)   
24

Lattice Constant
666.30 pm   
3
330.90 pm   
99+

Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
1.59   
7

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