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Atomic Structure of Americium and Barium

Americium
Barium
Atomic Structure of Barium and Americium


Atomic Properties
Atomic Number
95   
23
56   
99+
Electron Configuration
[Rn] 5f7 7s2   
[Xe] 6s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
95   
23
56   
99+
Number of Neutrons
148   
12
81   
99+
Number of Electrons
95   
23
56   
99+
Radius of an Atom
  
  
Atomic Radius
173.00 pm   
21
222.00 pm   
4
Covalent Radius
180.00 pm   
21
215.00 pm   
5
Van der Waals Radius
244.00 pm   
10
268.00 pm   
6
Atomic Weight
243.00 amu   
20
137.33 amu   
99+
Atomic Volume
17.86 cm3/mol   
29
39.24 cm3/mol   
5
Adjacent Atomic Numbers
  
  
Previous Element
Plutonium
  
Cesium
  
Next Element
Curium
  
Lanthanum
  
Valence Electron Potential
44.00 (-eV)   
40
21.30 (-eV)   
99+
Lattice Constant
346.81 pm   
99+
502.80 pm   
15
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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