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Atomic Structure of Protactinium and Technetium

Protactinium
Technetium
Atomic Structure of Technetium and Protactinium


Atomic Properties
Atomic Number
91   
27
43   
99+
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Kr] 4d5 5s2   
Crystal Structure
Tetragonal (TETR)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
HCP-Crystal-Structure-of-Technetium.jpg#100   
Atom
  
  
Number of Protons
91   
27
43   
99+
Number of Neutrons
122   
21
55   
99+
Number of Electrons
91   
27
43   
99+
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
136.00 pm   
99+
Covalent Radius
200.00 pm   
11
147.00 pm   
37
Van der Waals Radius
243.00 pm   
11
200.00 pm   
28
Atomic Weight
231.04 amu   
24
98.00 amu   
99+
Atomic Volume
15.00 cm3/mol   
34
8.50 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Molybdenum
  
Next Element
Uranium
  
Ruthenium
  
Valence Electron Potential
92.00 (-eV)   
11
180.00 (-eV)   
3
Lattice Constant
392.50 pm   
23
273.50 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.60   
5
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