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Atomic Structure of Actinium and Technetium


Atomic Structure of Technetium and Actinium


Atomic Properties

Atomic Number
89   
29
43   
99+

Electron Configuration
[Rn] 6d1 7s2   
[Kr] 4d5 5s2   

Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
HCP-Crystal-Structure-of-Technetium.jpg#100   

Atom
  
  

Number of Protons
89   
29
43   
99+

Number of Neutrons
138   
16
55   
99+

Number of Electrons
89   
29
43   
99+

Radius of an Atom
  
  

Atomic Radius
195.00 pm   
7
136.00 pm   
99+

Covalent Radius
Not Available   
147.00 pm   
37

Van der Waals Radius
Not Available   
200.00 pm   
28

Atomic Weight
227.00 amu   
25
98.00 amu   
99+

Atomic Volume
22.54 cm3/mol   
11
8.50 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Radium
  
Molybdenum
  

Next Element
Thorium
  
Ruthenium
  

Valence Electron Potential
38.60 (-eV)   
99+
180.00 (-eV)   
3

Lattice Constant
567.00 pm   
8
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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