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Atomic Structure of Calcium and Neptunium

Calcium
Neptunium
Atomic Structure of Neptunium and Calcium


Atomic Properties
Atomic Number
20   
99+
93   
25
Electron Configuration
[Ar] 4s2   
[Rn] 5f4 6d1 7s2   
Crystal Structure
Face Centered Cubic (FCC)   
Orthorhombic (ORTH)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
ORTH-Crystal-Structure-of-Neptunium.jpg#100   
Atom
  
  
Number of Protons
20   
99+
93   
25
Number of Neutrons
20   
99+
144   
14
Number of Electrons
20   
99+
93   
25
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
155.00 pm   
30
Covalent Radius
176.00 pm   
22
190.00 pm   
18
Van der Waals Radius
231.00 pm   
19
221.00 pm   
22
Atomic Weight
40.08 amu   
99+
237.00 amu   
22
Atomic Volume
29.90 cm3/mol   
7
11.62 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Potassium
  
Uranium
  
Next Element
Scandium
  
Plutonium
  
Valence Electron Potential
29.00 (-eV)   
99+
96.00 (-eV)   
9
Lattice Constant
558.84 pm   
9
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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