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Atomic Structure of Iridium and Americium


Atomic Structure of Americium and Iridium


Atomic Properties

Atomic Number
77   
39
95   
23

Electron Configuration
[Xe] 4f14 5d7 6s2   
[Rn] 5f7 7s2   

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

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

Atom
  
  

Number of Protons
74   
99+
95   
23

Number of Neutrons
110   
27
148   
12

Number of Electrons
74   
99+
95   
23

Radius of an Atom
  
  

Atomic Radius
136.00 pm   
99+
173.00 pm   
21

Covalent Radius
141.00 pm   
99+
180.00 pm   
21

Van der Waals Radius
202.00 pm   
27
244.00 pm   
10

Atomic Weight
192.22 amu   
34
243.00 amu   
20

Atomic Volume
9.53 cm3/mol   
99+
17.86 cm3/mol   
29

Adjacent Atomic Numbers
  
  

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Osmium
  
Plutonium
  

Next Element
Platinum
  
Curium
  

Valence Electron Potential
140.00 (-eV)   
5
44.00 (-eV)   
40

Lattice Constant
383.90 pm   
26
346.81 pm   
99+

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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