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Atomic Structure of Promethium and Iridium


Atomic Structure of Iridium and Promethium


Atomic Properties

Atomic Number
61   
99+
77   
39

Electron Configuration
[Xe] 4f5 6s2   
[Xe] 4f14 5d7 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100   
FCC-Crystal-Structure-of-Iridium.jpg#100   

Atom
  
  

Number of Protons
61   
99+
74   
99+

Number of Neutrons
84   
40
110   
27

Number of Electrons
61   
99+
74   
99+

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
136.00 pm   
99+

Covalent Radius
199.00 pm   
12
141.00 pm   
99+

Van der Waals Radius
236.00 pm   
16
202.00 pm   
27

Atomic Weight
145.00 amu   
99+
192.22 amu   
34

Atomic Volume
22.39 cm3/mol   
12
9.53 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  
Osmium
  

Next Element
Samarium
  
Platinum
  

Valence Electron Potential
44.10 (-eV)   
39
140.00 (-eV)   
5

Lattice Constant
Not Available   
383.90 pm   
26

Lattice Angles
Unknown   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

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