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Atomic Structure of Tantalum and 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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