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Atomic Structure of Americium and Actinium


Atomic Structure of Actinium and Americium


Atomic Properties

Atomic Number
95   
23
89   
29

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

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100   
FCC-Crystal-Structure-of-Actinium.jpg#100   

Atom
  
  

Number of Protons
95   
23
89   
29

Number of Neutrons
148   
12
138   
16

Number of Electrons
95   
23
89   
29

Radius of an Atom
  
  

Atomic Radius
173.00 pm   
21
195.00 pm   
7

Covalent Radius
180.00 pm   
21
Not Available   

Van der Waals Radius
244.00 pm   
10
Not Available   

Atomic Weight
243.00 amu   
20
227.00 amu   
25

Atomic Volume
17.86 cm3/mol   
29
22.54 cm3/mol   
11

Adjacent Atomic Numbers
  
  

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Valence Electron Potential
44.00 (-eV)   
40
38.60 (-eV)   
99+

Lattice Constant
346.81 pm   
99+
567.00 pm   
8

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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