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Atomic Structure of Americium and Thulium


Atomic Structure of Thulium and Americium


Atomic Properties

Atomic Number
95   
23
69   
99+

Electron Configuration
[Rn] 5f7 7s2   
[Xe] 4f13 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100   
HCP-Crystal-Structure-of-Thulium.jpg#100   

Atom
  
  

Number of Protons
95   
23
69   
99+

Number of Neutrons
148   
12
100   
32

Number of Electrons
95   
23
69   
99+

Radius of an Atom
  
  

Atomic Radius
173.00 pm   
21
176.00 pm   
18

Covalent Radius
180.00 pm   
21
160.00 pm   
30

Van der Waals Radius
244.00 pm   
10
Not Available   

Atomic Weight
243.00 amu   
20
168.93 amu   
99+

Atomic Volume
17.86 cm3/mol   
29
18.10 cm3/mol   
28

Adjacent Atomic Numbers
  
  

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Plutonium
  
Erbium
  

Next Element
Curium
  
Ytterbium
  

Valence Electron Potential
44.00 (-eV)   
40
49.70 (-eV)   
28

Lattice Constant
346.81 pm   
99+
353.75 pm   
40

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
1.57   
17

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