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Atomic Structure of Americium and Iridium


Atomic Structure of Iridium and Americium


Atomic Properties

Atomic Number
95   
23
77   
39

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

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

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

Atom
  
  

Number of Protons
95   
23
74   
99+

Number of Neutrons
148   
12
110   
27

Number of Electrons
95   
23
74   
99+

Radius of an Atom
  
  

Atomic Radius
173.00 pm   
21
136.00 pm   
99+

Covalent Radius
180.00 pm   
21
141.00 pm   
99+

Van der Waals Radius
244.00 pm   
10
202.00 pm   
27

Atomic Weight
243.00 amu   
20
192.22 amu   
34

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

Adjacent Atomic Numbers
  
  

Previous Element
Plutonium
  
Osmium
  

Next Element
Curium
  
Platinum
  

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

Lattice Constant
346.81 pm   
99+
383.90 pm   
26

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

Lattice C/A Ratio
Not Available   
Not Available   

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