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Atomic Structure of Technetium and Actinium

Technetium
Actinium
Atomic Structure of Actinium and Technetium


Atomic
Atomic Number
43  
99+
89  
29
Electron Configuration
[Kr] 4d5 5s2  
[Rn] 6d1 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
FCC-Crystal-Structure-of-Actinium.jpg#100  
Atom
  
  
Number of Protons
43  
99+
89  
29
Number of Neutrons
55  
99+
138  
17
Number of Electrons
43  
99+
89  
29
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
195.00 pm  
9
Covalent Radius
147.00 pm  
39
186.00 pm  
21
Van der Waals Radius
200.00 pm  
35
215.00 pm  
31
Atomic Weight
98.00 amu  
99+
227.00 amu  
25
Atomic Volume
8.50 cm3/mol  
99+
22.54 cm3/mol  
20
Adjacent Atomic Numbers
  
  
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Molybdenum
  
Radium
  
Next Element
Ruthenium
  
Thorium
  
Valence Electron Potential
180.00 (-eV)  
3
38.60 (-eV)  
99+
Lattice Constant
273.50 pm  
99+
567.00 pm  
9
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
21
1.89  
2
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