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Atomic Structure of Radium and Technetium

Radium
Technetium
Atomic Structure of Technetium and Radium


Atomic Properties
Atomic Number
88   
30
43   
99+
Electron Configuration
[Rn] 7s2   
[Kr] 4d5 5s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Technetium.jpg#100   
Atom
  
  
Number of Protons
88   
30
43   
99+
Number of Neutrons
138   
16
55   
99+
Number of Electrons
88   
30
43   
99+
Radius of an Atom
  
  
Atomic Radius
Not Available   
136.00 pm   
99+
Covalent Radius
221.00 pm   
3
147.00 pm   
37
Van der Waals Radius
283.00 pm   
4
200.00 pm   
28
Atomic Weight
226.00 amu   
26
98.00 amu   
99+
Atomic Volume
45.20 cm3/mol   
4
8.50 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Molybdenum
  
Next Element
Actinium
  
Ruthenium
  
Valence Electron Potential
20.10 (-eV)   
99+
180.00 (-eV)   
3
Lattice Constant
514.80 pm   
13
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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