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Atomic Structure of Erbium and Protactinium


Atomic Structure of Protactinium and Erbium


Atomic Properties

Atomic Number
68   
99+
91   
27

Electron Configuration
[Xe] 4f12 6s2   
[Rn] 5f2 6d1 7s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Tetragonal (TETR)   

Crystal Lattice
HCP-Crystal-Structure-of-Erbium.jpg#100   
TETR-Crystal-Structure-of-Protactinium.jpg#100   

Atom
  
  

Number of Protons
68   
99+
91   
27

Number of Neutrons
99   
33
122   
21

Number of Electrons
68   
99+
91   
27

Radius of an Atom
  
  

Atomic Radius
176.00 pm   
18
163.00 pm   
25

Covalent Radius
189.00 pm   
19
200.00 pm   
11

Van der Waals Radius
Not Available   
243.00 pm   
11

Atomic Weight
167.26 amu   
99+
231.04 amu   
24

Atomic Volume
18.40 cm3/mol   
25
15.00 cm3/mol   
34

Adjacent Atomic Numbers
  
  

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Holmium
Holmium
  
Thorium
Thorium
  

Next Element
Thulium
Thulium
  
Uranium
Uranium
  

Valence Electron Potential
49.00 (-eV)   
29
92.00 (-eV)   
11

Lattice Constant
355.88 pm   
39
392.50 pm   
23

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

Lattice C/A Ratio
1.57   
17
Not Available   

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