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Atomic Structure of Calcium and Promethium

Calcium
Promethium
Atomic Structure of Promethium and Calcium


Atomic Properties
Atomic Number
20   
99+
61   
99+
Electron Configuration
[Ar] 4s2   
[Xe] 4f5 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
20   
99+
61   
99+
Number of Neutrons
20   
99+
84   
40
Number of Electrons
20   
99+
61   
99+
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
183.00 pm   
10
Covalent Radius
176.00 pm   
22
199.00 pm   
12
Van der Waals Radius
231.00 pm   
19
236.00 pm   
16
Atomic Weight
40.08 amu   
99+
145.00 amu   
99+
Atomic Volume
29.90 cm3/mol   
7
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Potassium
  
Neodymium
  
Next Element
Scandium
  
Samarium
  
Valence Electron Potential
29.00 (-eV)   
99+
44.10 (-eV)   
39
Lattice Constant
558.84 pm   
9
Not Available   
Lattice Angles
π/2, π/2, π/2   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
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