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Atomic Structure of Iridium and Samarium


Atomic Structure of Samarium and Iridium


Atomic Properties

Atomic Number
77   
39
62   
99+

Electron Configuration
[Xe] 4f14 5d7 6s2   
[Xe] 4f6 6s2   

Crystal Structure
Face Centered Cubic (FCC)   
Rhombohedral (RHO)   

Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   

Atom
  
  

Number of Protons
74   
99+
62   
99+

Number of Neutrons
110   
27
88   
39

Number of Electrons
74   
99+
62   
99+

Radius of an Atom
  
  

Atomic Radius
136.00 pm   
99+
180.00 pm   
14

Covalent Radius
141.00 pm   
99+
198.00 pm   
13

Van der Waals Radius
202.00 pm   
27
229.00 pm   
20

Atomic Weight
192.22 amu   
34
150.36 amu   
99+

Atomic Volume
9.53 cm3/mol   
99+
19.95 cm3/mol   
19

Adjacent Atomic Numbers
  
  

Previous Element
Osmium
  
Promethium
  

Next Element
Platinum
  
Europium
  

Valence Electron Potential
140.00 (-eV)   
5
44.80 (-eV)   
37

Lattice Constant
383.90 pm   
26
362.10 pm   
33

Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
Not Available   

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