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Atomic Structure of Americium and Thorium


Atomic Structure of Thorium and Americium


Atomic Properties

Atomic Number
95   
23
90   
28

Electron Configuration
[Rn] 5f7 7s2   
[Rn] 6d2 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-Thorium.jpg#100   

Atom
  
  

Number of Protons
95   
23
90   
28

Number of Neutrons
148   
12
142   
15

Number of Electrons
95   
23
90   
28

Radius of an Atom
  
  

Atomic Radius
173.00 pm   
21
179.80 pm   
15

Covalent Radius
180.00 pm   
21
206.00 pm   
7

Van der Waals Radius
244.00 pm   
10
237.00 pm   
15

Atomic Weight
243.00 amu   
20
232.04 amu   
23

Atomic Volume
17.86 cm3/mol   
29
19.90 cm3/mol   
20

Adjacent Atomic Numbers
  
  

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Actinium
  

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Curium
  

Valence Electron Potential
44.00 (-eV)   
40
59.30 (-eV)   
23

Lattice Constant
346.81 pm   
99+
508.42 pm   
14

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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