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Atomic Structure of Actinium and Americium


Atomic Structure of Americium and Actinium


Atomic Properties

Atomic Number
89   
29
95   
23

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

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

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

Atom
  
  

Number of Protons
89   
29
95   
23

Number of Neutrons
138   
16
148   
12

Number of Electrons
89   
29
95   
23

Radius of an Atom
  
  

Atomic Radius
195.00 pm   
7
173.00 pm   
21

Covalent Radius
Not Available   
180.00 pm   
21

Van der Waals Radius
Not Available   
244.00 pm   
10

Atomic Weight
227.00 amu   
25
243.00 amu   
20

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

Adjacent Atomic Numbers
  
  

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

Lattice Constant
567.00 pm   
8
346.81 pm   
99+

Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
Not Available   

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