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Atomic Structure of Potassium and Lanthanum

Potassium
Lanthanum
Atomic Structure of Lanthanum and Potassium


Atomic Properties
Atomic Number
19   
99+
57   
99+
Electron Configuration
[Ar] 4s1   
[Xe] 5d2 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
Atom
  
  
Number of Protons
19   
99+
57   
99+
Number of Neutrons
20   
99+
82   
99+
Number of Electrons
19   
99+
57   
99+
Radius of an Atom
  
  
Atomic Radius
227.00 pm   
3
187.00 pm   
8
Covalent Radius
203.00 pm   
9
207.00 pm   
6
Van der Waals Radius
275.00 pm   
5
240.00 pm   
13
Atomic Weight
39.10 amu   
99+
138.91 amu   
99+
Atomic Volume
45.46 cm3/mol   
3
20.73 cm3/mol   
16
Adjacent Atomic Numbers
  
  
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Aluminium
  
Barium
  
Next Element
Calcium
  
Cerium
  
Valence Electron Potential
10.40 (-eV)   
99+
40.71 (-eV)   
99+
Lattice Constant
532.80 pm   
12
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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