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Atomic Structure of Lanthanum and Scandium


Atomic Structure of Scandium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
21   
99+

Electron Configuration
[Xe] 5d2 6s2   
[Ar] 3d1 4s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
HCP-Crystal-Structure-of-Scandium.jpg#100   

Atom
  
  

Number of Protons
57   
99+
21   
99+

Number of Neutrons
82   
99+
24   
99+

Number of Electrons
57   
99+
21   
99+

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
162.00 pm   
26

Covalent Radius
207.00 pm   
6
170.00 pm   
25

Van der Waals Radius
240.00 pm   
13
211.00 pm   
25

Atomic Weight
138.91 amu   
99+
44.96 amu   
99+

Atomic Volume
20.73 cm3/mol   
16
15.00 cm3/mol   
34

Adjacent Atomic Numbers
  
  

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Barium
  
Calcium
  

Next Element
Cerium
  
Titanium
  

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

Lattice Constant
377.20 pm   
28
330.90 pm   
99+

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

Lattice C/A Ratio
1.62   
2
1.59   
7

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