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Atomic Structure of Actinium and Radium


Atomic Structure of Radium and Actinium


Atomic Properties

Atomic Number
89   
29
88   
30

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

Crystal Structure
Face Centered Cubic (FCC)   
Body Centered Cubic (BCC)   

Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
89   
29
88   
30

Number of Neutrons
138   
16
138   
16

Number of Electrons
89   
29
88   
30

Radius of an Atom
  
  

Atomic Radius
195.00 pm   
7
Not Available   

Covalent Radius
Not Available   
221.00 pm   
3

Van der Waals Radius
Not Available   
283.00 pm   
4

Atomic Weight
227.00 amu   
25
226.00 amu   
26

Atomic Volume
22.54 cm3/mol   
11
45.20 cm3/mol   
4

Adjacent Atomic Numbers
  
  

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Radium
  
Francium
  

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Thorium
  
Actinium
  

Valence Electron Potential
38.60 (-eV)   
99+
20.10 (-eV)   
99+

Lattice Constant
567.00 pm   
8
514.80 pm   
13

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

Lattice C/A Ratio
Not Available   
Not Available   

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