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Atomic Structure of Magnesium and Promethium

Magnesium
Promethium
Atomic Structure of Promethium and Magnesium


Atomic Properties
Atomic Number
12   
99+
61   
99+
Electron Configuration
[Ne] 3s2   
[Xe] 4f5 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
HCP-Crystal-Structure-of-Magnesium.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
12   
99+
61   
99+
Number of Neutrons
12   
99+
84   
40
Number of Electrons
12   
99+
61   
99+
Radius of an Atom
  
  
Atomic Radius
160.00 pm   
27
183.00 pm   
10
Covalent Radius
141.00 pm   
99+
199.00 pm   
12
Van der Waals Radius
173.00 pm   
37
236.00 pm   
16
Atomic Weight
24.31 amu   
99+
145.00 amu   
99+
Atomic Volume
13.97 cm3/mol   
37
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Sodium
  
Neodymium
  
Next Element
Aluminium
  
Samarium
  
Valence Electron Potential
40.00 (-eV)   
99+
44.10 (-eV)   
39
Lattice Constant
320.94 pm   
99+
Not Available   
Lattice Angles
π/2, π/2, 2 π/3   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
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