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Atomic Structure of Americium and Promethium

Americium
Promethium
Atomic Structure of Promethium and Americium


Atomic Properties
Atomic Number
95   
23
61   
99+
Electron Configuration
[Rn] 5f7 7s2   
[Xe] 4f5 6s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
95   
23
61   
99+
Number of Neutrons
148   
12
84   
40
Number of Electrons
95   
23
61   
99+
Radius of an Atom
  
  
Atomic Radius
173.00 pm   
21
183.00 pm   
10
Covalent Radius
180.00 pm   
21
199.00 pm   
12
Van der Waals Radius
244.00 pm   
10
236.00 pm   
16
Atomic Weight
243.00 amu   
20
145.00 amu   
99+
Atomic Volume
17.86 cm3/mol   
29
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Plutonium
  
Neodymium
  
Next Element
Curium
  
Samarium
  
Valence Electron Potential
44.00 (-eV)   
40
44.10 (-eV)   
39
Lattice Constant
346.81 pm   
99+
Not Available   
Lattice Angles
π/2, π/2, 2 π/3   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
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