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Atomic Structure of Samarium and Neptunium


Atomic Structure of Neptunium and Samarium


Atomic Properties

Atomic Number
62   
99+
93   
25

Electron Configuration
[Xe] 4f6 6s2   
[Rn] 5f4 6d1 7s2   

Crystal Structure
Rhombohedral (RHO)   
Orthorhombic (ORTH)   

Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100   
ORTH-Crystal-Structure-of-Neptunium.jpg#100   

Atom
  
  

Number of Protons
62   
99+
93   
25

Number of Neutrons
88   
39
144   
14

Number of Electrons
62   
99+
93   
25

Radius of an Atom
  
  

Atomic Radius
180.00 pm   
14
155.00 pm   
30

Covalent Radius
198.00 pm   
13
190.00 pm   
18

Van der Waals Radius
229.00 pm   
20
221.00 pm   
22

Atomic Weight
150.36 amu   
99+
237.00 amu   
22

Atomic Volume
19.95 cm3/mol   
19
11.62 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Promethium
  
Uranium
  

Next Element
Europium
  
Plutonium
  

Valence Electron Potential
44.80 (-eV)   
37
96.00 (-eV)   
9

Lattice Constant
362.10 pm   
33
666.30 pm   
3

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

Lattice C/A Ratio
Not Available   
Not Available   

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