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Atomic Structure of Calcium and Samarium

Calcium
Samarium
Atomic Structure of Samarium and Calcium


Atomic Properties
Atomic Number
20   
99+
62   
99+
Electron Configuration
[Ar] 4s2   
[Xe] 4f6 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Rhombohedral (RHO)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   
Atom
  
  
Number of Protons
20   
99+
62   
99+
Number of Neutrons
20   
99+
88   
39
Number of Electrons
20   
99+
62   
99+
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
180.00 pm   
14
Covalent Radius
176.00 pm   
22
198.00 pm   
13
Van der Waals Radius
231.00 pm   
19
229.00 pm   
20
Atomic Weight
40.08 amu   
99+
150.36 amu   
99+
Atomic Volume
29.90 cm3/mol   
7
19.95 cm3/mol   
19
Adjacent Atomic Numbers
  
  
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Potassium
  
Promethium
  
Next Element
Scandium
  
Europium
  
Valence Electron Potential
29.00 (-eV)   
99+
44.80 (-eV)   
37
Lattice Constant
558.84 pm   
9
362.10 pm   
33
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
Not Available   
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