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Atomic Structure of Scandium and Actinium


Atomic Structure of Actinium and Scandium


Atomic Properties

Atomic Number
21   
99+
89   
29

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

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

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

Atom
  
  

Number of Protons
21   
99+
89   
29

Number of Neutrons
24   
99+
138   
16

Number of Electrons
21   
99+
89   
29

Radius of an Atom
  
  

Atomic Radius
162.00 pm   
26
195.00 pm   
7

Covalent Radius
170.00 pm   
25
Not Available   

Van der Waals Radius
211.00 pm   
25
Not Available   

Atomic Weight
44.96 amu   
99+
227.00 amu   
25

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

Adjacent Atomic Numbers
  
  

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

Lattice Constant
330.90 pm   
99+
567.00 pm   
8

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

Lattice C/A Ratio
1.59   
7
Not Available   

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