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Atomic Structure of Calcium and Actinium

Calcium
Actinium
Atomic Structure of Actinium and Calcium


Atomic Properties
Atomic Number
20   
99+
89   
29
Electron Configuration
[Ar] 4s2   
[Rn] 6d1 7s2   
Crystal Structure
Face Centered Cubic (FCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
FCC-Crystal-Structure-of-Actinium.jpg#100   
Atom
  
  
Number of Protons
20   
99+
89   
29
Number of Neutrons
20   
99+
138   
16
Number of Electrons
20   
99+
89   
29
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
195.00 pm   
7
Covalent Radius
176.00 pm   
22
Not Available   
Van der Waals Radius
231.00 pm   
19
Not Available   
Atomic Weight
40.08 amu   
99+
227.00 amu   
25
Atomic Volume
29.90 cm3/mol   
7
22.54 cm3/mol   
11
Adjacent Atomic Numbers
  
  
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Potassium
  
Radium
  
Next Element
Scandium
  
Thorium
  
Valence Electron Potential
29.00 (-eV)   
99+
38.60 (-eV)   
99+
Lattice Constant
558.84 pm   
9
567.00 pm   
8
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
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