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Atomic Structure of Americium and Neptunium


Atomic Structure of Neptunium and Americium


Atomic Properties

Atomic Number
95   
23
93   
25

Electron Configuration
[Rn] 5f7 7s2   
[Rn] 5f4 6d1 7s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Orthorhombic (ORTH)   

Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100   
ORTH-Crystal-Structure-of-Neptunium.jpg#100   

Atom
  
  

Number of Protons
95   
23
93   
25

Number of Neutrons
148   
12
144   
14

Number of Electrons
95   
23
93   
25

Radius of an Atom
  
  

Atomic Radius
173.00 pm   
21
155.00 pm   
30

Covalent Radius
180.00 pm   
21
190.00 pm   
18

Van der Waals Radius
244.00 pm   
10
221.00 pm   
22

Atomic Weight
243.00 amu   
20
237.00 amu   
22

Atomic Volume
17.86 cm3/mol   
29
11.62 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Plutonium
  
Uranium
  

Next Element
Curium
  
Plutonium
  

Valence Electron Potential
44.00 (-eV)   
40
96.00 (-eV)   
9

Lattice Constant
346.81 pm   
99+
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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