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Atomic Structure of Technetium and Calcium

Technetium
Calcium
Atomic Structure of Calcium and Technetium


Atomic Properties
Atomic Number
43   
99+
20   
99+
Electron Configuration
[Kr] 4d5 5s2   
[Ar] 4s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100   
FCC-Crystal-Structure-of-Calcium.jpg#100   
Atom
  
  
Number of Protons
43   
99+
20   
99+
Number of Neutrons
55   
99+
20   
99+
Number of Electrons
43   
99+
20   
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
197.00 pm   
6
Covalent Radius
147.00 pm   
37
176.00 pm   
22
Van der Waals Radius
200.00 pm   
28
231.00 pm   
19
Atomic Weight
98.00 amu   
99+
40.08 amu   
99+
Atomic Volume
8.50 cm3/mol   
99+
29.90 cm3/mol   
7
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Potassium
  
Next Element
Ruthenium
  
Scandium
  
Valence Electron Potential
180.00 (-eV)   
3
29.00 (-eV)   
99+
Lattice Constant
273.50 pm   
99+
558.84 pm   
9
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.60   
5
Not Available   
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