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Atomic Structure of Technetium and Lanthanum


Atomic Structure of Lanthanum and Technetium


Atomic

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  
10

Covalent Radius
147.00 pm  
39
207.00 pm  
6

Van der Waals Radius
200.00 pm  
35
240.00 pm  
17

Atomic Weight
98.00 amu  
99+
138.91 amu  
99+

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

Adjacent Atomic Numbers
  
  

Previous Element
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  
31

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

Lattice C/A Ratio
1.60  
21
1.62  
16

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