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Atomic Structure of Calcium and Americium

Calcium
Americium
Atomic Structure of Americium and Calcium


Atomic Properties
Atomic Number
20   
99+
95   
23
Electron Configuration
[Ar] 4s2   
[Rn] 5f7 7s2   
Crystal Structure
Face Centered Cubic (FCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100   
DHCP-Crystal-Structure-of-Americium.jpg#100   
Atom
  
  
Number of Protons
20   
99+
95   
23
Number of Neutrons
20   
99+
148   
12
Number of Electrons
20   
99+
95   
23
Radius of an Atom
  
  
Atomic Radius
197.00 pm   
6
173.00 pm   
21
Covalent Radius
176.00 pm   
22
180.00 pm   
21
Van der Waals Radius
231.00 pm   
19
244.00 pm   
10
Atomic Weight
40.08 amu   
99+
243.00 amu   
20
Atomic Volume
29.90 cm3/mol   
7
17.86 cm3/mol   
29
Adjacent Atomic Numbers
  
  
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Potassium
  
Plutonium
  
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Scandium
  
Curium
  
Valence Electron Potential
29.00 (-eV)   
99+
44.00 (-eV)   
40
Lattice Constant
558.84 pm   
9
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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