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Atomic Structure of Promethium and Calcium

Promethium
Calcium
Atomic Structure of Calcium and Promethium


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