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Atomic Structure of Technetium and Samarium

Technetium
Samarium
Atomic Structure of Samarium and Technetium


Atomic
Atomic Number
43  
99+
62  
99+
Electron Configuration
[Kr] 4d5 5s2  
[Xe] 4f6 6s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Rhombohedral (RHO)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
RHO-Crystal-Structure-of-Samarium.jpg#100  
Atom
  
  
Number of Protons
43  
99+
62  
99+
Number of Neutrons
55  
99+
88  
40
Number of Electrons
43  
99+
62  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
180.00 pm  
16
Covalent Radius
147.00 pm  
39
198.00 pm  
13
Van der Waals Radius
200.00 pm  
35
229.00 pm  
25
Atomic Weight
98.00 amu  
99+
150.36 amu  
99+
Atomic Volume
8.50 cm3/mol  
99+
19.95 cm3/mol  
31
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Promethium
  
Next Element
Ruthenium
  
Europium
  
Valence Electron Potential
180.00 (-eV)  
3
44.80 (-eV)  
38
Lattice Constant
273.50 pm  
99+
362.10 pm  
37
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  
15
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