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Atomic Structure of Americium and Hafnium

Americium
Hafnium
Atomic Structure of Hafnium and Americium


Atomic Properties
Atomic Number
95   
23
72   
99+
Electron Configuration
[Rn] 5f7 7s2   
[Xe] 4f14 5d2 6s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
95   
23
72   
99+
Number of Neutrons
148   
12
106   
29
Number of Electrons
95   
23
72   
99+
Radius of an Atom
  
  
Atomic Radius
173.00 pm   
21
159.00 pm   
28
Covalent Radius
180.00 pm   
21
175.00 pm   
23
Van der Waals Radius
244.00 pm   
10
200.00 pm   
28
Atomic Weight
243.00 amu   
20
178.49 amu   
39
Atomic Volume
17.86 cm3/mol   
29
13.60 cm3/mol   
38
Adjacent Atomic Numbers
  
  
Previous Element
Plutonium
  
Lutetium
  
Next Element
Curium
  
Tantalum
  
Valence Electron Potential
44.00 (-eV)   
40
81.00 (-eV)   
16
Lattice Constant
346.81 pm   
99+
319.64 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.58   
12
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