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Atomic Structure of Barium and Americium

Barium
Americium
Atomic Structure of Americium and Barium


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