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Atomic Structure of Actinium and Scandium


Atomic Structure of Scandium and Actinium


Atomic Properties

Atomic Number
89   
29
21   
99+

Electron Configuration
[Rn] 6d1 7s2   
[Ar] 3d1 4s2   

Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
HCP-Crystal-Structure-of-Scandium.jpg#100   

Atom
  
  

Number of Protons
89   
29
21   
99+

Number of Neutrons
138   
16
24   
99+

Number of Electrons
89   
29
21   
99+

Radius of an Atom
  
  

Atomic Radius
195.00 pm   
7
162.00 pm   
26

Covalent Radius
Not Available   
170.00 pm   
25

Van der Waals Radius
Not Available   
211.00 pm   
25

Atomic Weight
227.00 amu   
25
44.96 amu   
99+

Atomic Volume
22.54 cm3/mol   
11
15.00 cm3/mol   
34

Adjacent Atomic Numbers
  
  

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Calcium
  

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Thorium
  
Titanium
  

Valence Electron Potential
38.60 (-eV)   
99+
58.00 (-eV)   
24

Lattice Constant
567.00 pm   
8
330.90 pm   
99+

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

Lattice C/A Ratio
Not Available   
1.59   
7

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