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Atomic Structure of Lanthanum and Yttrium


Atomic Structure of Yttrium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
39   
99+

Electron Configuration
[Xe] 5d2 6s2   
[Kr] 4d1 5s2   

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

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

Atom
  
  

Number of Protons
57   
99+
39   
99+

Number of Neutrons
82   
99+
50   
99+

Number of Electrons
57   
99+
39   
99+

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
180.00 pm   
14

Covalent Radius
207.00 pm   
6
190.00 pm   
18

Van der Waals Radius
240.00 pm   
13
200.00 pm   
28

Atomic Weight
138.91 amu   
99+
88.91 amu   
99+

Atomic Volume
20.73 cm3/mol   
16
19.80 cm3/mol   
21

Adjacent Atomic Numbers
  
  

Previous Element
Barium
  
Strontium
  

Next Element
Cerium
  
Zirconium
  

Valence Electron Potential
40.71 (-eV)   
99+
48.00 (-eV)   
30

Lattice Constant
377.20 pm   
28
364.74 pm   
31

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

Lattice C/A Ratio
1.62   
2
1.57   
16

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