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Atomic Structure of Radium and Americium


Atomic Structure of Americium and Radium


Atomic Properties

Atomic Number
88   
30
95   
23

Electron Configuration
[Rn] 7s2   
[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
88   
30
95   
23

Number of Neutrons
138   
16
148   
12

Number of Electrons
88   
30
95   
23

Radius of an Atom
  
  

Atomic Radius
Not Available   
173.00 pm   
21

Covalent Radius
221.00 pm   
3
180.00 pm   
21

Van der Waals Radius
283.00 pm   
4
244.00 pm   
10

Atomic Weight
226.00 amu   
26
243.00 amu   
20

Atomic Volume
45.20 cm3/mol   
4
17.86 cm3/mol   
29

Adjacent Atomic Numbers
  
  

Previous Element
Francium
  
Plutonium
  

Next Element
Actinium
  
Curium
  

Valence Electron Potential
20.10 (-eV)   
99+
44.00 (-eV)   
40

Lattice Constant
514.80 pm   
13
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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