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Atomic Structure of Calcium and Lanthanum

Calcium
Lanthanum
Atomic Structure of Lanthanum and Calcium


Atomic Properties
Atomic Number
20   
99+
57   
99+
Electron Configuration
[Ar] 4s2   
[Xe] 5d2 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
Atom
  
  
Number of Protons
20   
99+
57   
99+
Number of Neutrons
20   
99+
82   
99+
Number of Electrons
20   
99+
57   
99+
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
187.00 pm   
8
Covalent Radius
176.00 pm   
22
207.00 pm   
6
Van der Waals Radius
231.00 pm   
19
240.00 pm   
13
Atomic Weight
40.08 amu   
99+
138.91 amu   
99+
Atomic Volume
29.90 cm3/mol   
7
20.73 cm3/mol   
16
Adjacent Atomic Numbers
  
  
Previous Element
Potassium
  
Barium
  
Next Element
Scandium
  
Cerium
  
Valence Electron Potential
29.00 (-eV)   
99+
40.71 (-eV)   
99+
Lattice Constant
558.84 pm   
9
377.20 pm   
28
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.62   
2
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