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Atomic Structure of Lanthanum and Technetium


Atomic Structure of Technetium and Lanthanum


Atomic

Atomic Number
57  
99+
43  
99+

Electron Configuration
[Xe] 5d2 6s2  
[Kr] 4d5 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-Technetium.jpg#100  

Atom
  
  

Number of Protons
57  
99+
43  
99+

Number of Neutrons
82  
99+
55  
99+

Number of Electrons
57  
99+
43  
99+

Radius of an Atom
  
  

Atomic Radius
187.00 pm  
10
136.00 pm  
99+

Covalent Radius
207.00 pm  
6
147.00 pm  
39

Van der Waals Radius
240.00 pm  
17
200.00 pm  
35

Atomic Weight
138.91 amu  
99+
98.00 amu  
99+

Atomic Volume
20.73 cm3/mol  
26
8.50 cm3/mol  
99+

Adjacent Atomic Numbers
  
  

Previous Element
Barium
  

Next Element
Cerium
  
Ruthenium
  

Valence Electron Potential
40.71 (-eV)  
99+
180.00 (-eV)  
3

Lattice Constant
377.20 pm  
31
273.50 pm  
99+

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

Lattice C/A Ratio
1.62  
16
1.60  
21

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