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Atomic Structure of Protactinium and Scandium


Atomic Structure of Scandium and Protactinium


Atomic Properties

Atomic Number
91   
27
21   
99+

Electron Configuration
[Rn] 5f2 6d1 7s2   
[Ar] 3d1 4s2   

Crystal Structure
Tetragonal (TETR)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
HCP-Crystal-Structure-of-Scandium.jpg#100   

Atom
  
  

Number of Protons
91   
27
21   
99+

Number of Neutrons
122   
21
24   
99+

Number of Electrons
91   
27
21   
99+

Radius of an Atom
  
  

Atomic Radius
163.00 pm   
25
162.00 pm   
26

Covalent Radius
200.00 pm   
11
170.00 pm   
25

Van der Waals Radius
243.00 pm   
11
211.00 pm   
25

Atomic Weight
231.04 amu   
24
44.96 amu   
99+

Atomic Volume
15.00 cm3/mol   
34
15.00 cm3/mol   
34

Adjacent Atomic Numbers
  
  

Previous Element
Thorium
  
Calcium
  

Next Element
Uranium
  
Titanium
  

Valence Electron Potential
92.00 (-eV)   
11
58.00 (-eV)   
24

Lattice Constant
392.50 pm   
23
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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