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Atomic Structure of Promethium and Neptunium


Atomic Structure of Neptunium and Promethium


Atomic Properties

Atomic Number
61   
99+
93   
25

Electron Configuration
[Xe] 4f5 6s2   
[Rn] 5f4 6d1 7s2   

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

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

Atom
  
  

Number of Protons
61   
99+
93   
25

Number of Neutrons
84   
40
144   
14

Number of Electrons
61   
99+
93   
25

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
155.00 pm   
30

Covalent Radius
199.00 pm   
12
190.00 pm   
18

Van der Waals Radius
236.00 pm   
16
221.00 pm   
22

Atomic Weight
145.00 amu   
99+
237.00 amu   
22

Atomic Volume
22.39 cm3/mol   
12
11.62 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  
Uranium
  

Next Element
Samarium
  
Plutonium
  

Valence Electron Potential
44.10 (-eV)   
39
96.00 (-eV)   
9

Lattice Constant
Not Available   
666.30 pm   
3

Lattice Angles
Unknown   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

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