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Atomic Structure of Technetium and Lanthanum

Technetium
Lanthanum
Atomic Structure of Lanthanum and Technetium


Atomic Properties
Atomic Number
43   
99+
57   
99+
Electron Configuration
[Kr] 4d5 5s2   
[Xe] 5d2 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100   
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
Atom
  
  
Number of Protons
43   
99+
57   
99+
Number of Neutrons
55   
99+
82   
99+
Number of Electrons
43   
99+
57   
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
187.00 pm   
8
Covalent Radius
147.00 pm   
37
207.00 pm   
6
Van der Waals Radius
200.00 pm   
28
240.00 pm   
13
Atomic Weight
98.00 amu   
99+
138.91 amu   
99+
Atomic Volume
8.50 cm3/mol   
99+
20.73 cm3/mol   
16
Adjacent Atomic Numbers
  
  
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Molybdenum
  
Barium
  
Next Element
Ruthenium
  
Cerium
  
Valence Electron Potential
180.00 (-eV)   
3
40.71 (-eV)   
99+
Lattice Constant
273.50 pm   
99+
377.20 pm   
28
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.60   
5
1.62   
2
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