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Atomic Structure of Technetium and Mendelevium

Technetium
Mendelevium
Atomic Structure of Mendelevium and Technetium


Atomic
Atomic Number
43  
99+
101  
17
Electron Configuration
[Kr] 4d5 5s2  
[Rn] 5f13 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Not Known  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
Unknown-Crystal-Structure-of-Mendelevium.jpg#100  
Atom
  
  
Number of Protons
43  
99+
101  
17
Number of Neutrons
55  
99+
157  
8
Number of Electrons
43  
99+
101  
17
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
175.00 pm  
21
Covalent Radius
147.00 pm  
39
175.00 pm  
25
Van der Waals Radius
200.00 pm  
35
246.00 pm  
12
Atomic Weight
98.00 amu  
99+
258.00 amu  
14
Atomic Volume
8.50 cm3/mol  
99+
19.90 cm3/mol  
32
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Fermium
  
Next Element
Ruthenium
  
Nobelium
  
Valence Electron Potential
180.00 (-eV)  
3
63.70 (-eV)  
23
Lattice Constant
273.50 pm  
99+
-  
Lattice Angles
π/2, π/2, 2 π/3  
-  
Lattice C/A Ratio
1.60  
21
1.58  
36
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