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Atomic Structure of Americium and 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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