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Atomic Structure of Hafnium and Calcium

Hafnium
Calcium
Atomic Structure of Calcium and Hafnium


Atomic Properties
Atomic Number
72   
99+
20   
99+
Electron Configuration
[Xe] 4f14 5d2 6s2   
[Ar] 4s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Calcium.jpg#100   
Atom
  
  
Number of Protons
72   
99+
20   
99+
Number of Neutrons
106   
29
20   
99+
Number of Electrons
72   
99+
20   
99+
Radius of an Atom
  
  
Atomic Radius
159.00 pm   
28
197.00 pm   
6
Covalent Radius
175.00 pm   
23
176.00 pm   
22
Van der Waals Radius
200.00 pm   
28
231.00 pm   
19
Atomic Weight
178.49 amu   
39
40.08 amu   
99+
Atomic Volume
13.60 cm3/mol   
38
29.90 cm3/mol   
7
Adjacent Atomic Numbers
  
  
Previous Element
Lutetium
  
Potassium
  
Next Element
Tantalum
  
Scandium
  
Valence Electron Potential
81.00 (-eV)   
16
29.00 (-eV)   
99+
Lattice Constant
319.64 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
1.58   
12
Not Available   
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