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Atomic Structure of Thorium and Promethium


Atomic Structure of Promethium and Thorium


Atomic Properties

Atomic Number
90   
28
61   
99+

Electron Configuration
[Rn] 6d2 7s2   
[Xe] 4f5 6s2   

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

Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   

Atom
  
  

Number of Protons
90   
28
61   
99+

Number of Neutrons
142   
15
84   
40

Number of Electrons
90   
28
61   
99+

Radius of an Atom
  
  

Atomic Radius
179.80 pm   
15
183.00 pm   
10

Covalent Radius
206.00 pm   
7
199.00 pm   
12

Van der Waals Radius
237.00 pm   
15
236.00 pm   
16

Atomic Weight
232.04 amu   
23
145.00 amu   
99+

Atomic Volume
19.90 cm3/mol   
20
22.39 cm3/mol   
12

Adjacent Atomic Numbers
  
  

Previous Element
Actinium
  
Neodymium
  

Next Element
Samarium
  

Valence Electron Potential
59.30 (-eV)   
23
44.10 (-eV)   
39

Lattice Constant
508.42 pm   
14
Not Available   

Lattice Angles
π/2, π/2, π/2   
Unknown   

Lattice C/A Ratio
Not Available   
Not Available   

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