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Atomic Structure of Beryllium and Americium

Beryllium
Americium
Atomic Structure of Americium and Beryllium


Atomic Properties
Atomic Number
4   
99+
95   
23
Electron Configuration
[He] 2s2   
[Rn] 5f7 7s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
HCP-Crystal-Structure-of-Beryllium.jpg#100   
DHCP-Crystal-Structure-of-Americium.jpg#100   
Atom
  
  
Number of Protons
4   
99+
95   
23
Number of Neutrons
5   
99+
148   
12
Number of Electrons
4   
99+
95   
23
Radius of an Atom
  
  
Atomic Radius
112.00 pm   
99+
173.00 pm   
21
Covalent Radius
96.00 pm   
99+
180.00 pm   
21
Van der Waals Radius
153.00 pm   
99+
244.00 pm   
10
Atomic Weight
9.01 amu   
99+
243.00 amu   
20
Atomic Volume
5.00 cm3/mol   
99+
17.86 cm3/mol   
29
Adjacent Atomic Numbers
  
  
Previous Element
Lithium
  
Plutonium
  
Next Element
Sodium
  
Curium
  
Valence Electron Potential
82.00 (-eV)   
15
44.00 (-eV)   
40
Lattice Constant
228.58 pm   
99+
346.81 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.57   
18
Not Available   
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