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Atomic Structure of Tantalum and Promethium

Tantalum
Promethium
Atomic Structure of Promethium and Tantalum


Atomic Properties
Atomic Number
73   
99+
61   
99+
Electron Configuration
[Xe] 4f14 5d3 6s2   
[Xe] 4f5 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Promethium.jpg#100   
Atom
  
  
Number of Protons
73   
99+
61   
99+
Number of Neutrons
108   
28
84   
40
Number of Electrons
73   
99+
61   
99+
Radius of an Atom
  
  
Atomic Radius
146.00 pm   
35
183.00 pm   
10
Covalent Radius
170.00 pm   
25
199.00 pm   
12
Van der Waals Radius
200.00 pm   
28
236.00 pm   
16
Atomic Weight
180.95 amu   
38
145.00 amu   
99+
Atomic Volume
10.90 cm3/mol   
99+
22.39 cm3/mol   
12
Adjacent Atomic Numbers
  
  
Previous Element
Hafnium
  
Neodymium
  
Next Element
Tungsten
  
Samarium
  
Valence Electron Potential
110.00 (-eV)   
7
44.10 (-eV)   
39
Lattice Constant
330.13 pm   
99+
Not Available   
Lattice Angles
π/2, π/2, π/2   
Unknown   
Lattice C/A Ratio
Not Available   
Not Available   
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