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Atomic Structure of Calcium and Holmium

Calcium
Holmium
Atomic Structure of Holmium and Calcium


Atomic Properties
Atomic Number
20   
99+
67   
99+
Electron Configuration
[Ar] 4s2   
[Xe] 4f11 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
HCP-Crystal-Structure-of-Holmium.jpg#100   
Atom
  
  
Number of Protons
20   
99+
67   
99+
Number of Neutrons
20   
99+
98   
34
Number of Electrons
20   
99+
67   
99+
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
176.00 pm   
18
Covalent Radius
176.00 pm   
22
192.00 pm   
17
Van der Waals Radius
231.00 pm   
19
216.00 pm   
24
Atomic Weight
40.08 amu   
99+
164.93 amu   
99+
Atomic Volume
29.90 cm3/mol   
7
18.70 cm3/mol   
24
Adjacent Atomic Numbers
  
  
Previous Element
Potassium
  
Dysprosium
  
Next Element
Scandium
  
Erbium
  
Valence Electron Potential
29.00 (-eV)   
99+
47.90 (-eV)   
31
Lattice Constant
558.84 pm   
9
357.73 pm   
38
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.57   
17
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