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Atomic Structure of Thorium and Americium

Thorium
Americium
Atomic Structure of Americium and Thorium


Atomic Properties
Atomic Number
90   
28
95   
23
Electron Configuration
[Rn] 6d2 7s2   
[Rn] 5f7 7s2   
Crystal Structure
Face Centered Cubic (FCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
DHCP-Crystal-Structure-of-Americium.jpg#100   
Atom
  
  
Number of Protons
90   
28
95   
23
Number of Neutrons
142   
15
148   
12
Number of Electrons
90   
28
95   
23
Radius of an Atom
  
  
Atomic Radius
179.80 pm   
15
173.00 pm   
21
Covalent Radius
206.00 pm   
7
180.00 pm   
21
Van der Waals Radius
237.00 pm   
15
244.00 pm   
10
Atomic Weight
232.04 amu   
23
243.00 amu   
20
Atomic Volume
19.90 cm3/mol   
20
17.86 cm3/mol   
29
Adjacent Atomic Numbers
  
  
Previous Element
Actinium
  
Plutonium
  
Next Element
Protactinium
  
Curium
  
Valence Electron Potential
59.30 (-eV)   
23
44.00 (-eV)   
40
Lattice Constant
508.42 pm   
14
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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