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Atomic Structure of Protactinium and Erbium


Atomic Structure of Erbium and Protactinium


Atomic Properties

Atomic Number
91   
27
68   
99+

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

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

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

Atom
  
  

Number of Protons
91   
27
68   
99+

Number of Neutrons
122   
21
99   
33

Number of Electrons
91   
27
68   
99+

Radius of an Atom
  
  

Atomic Radius
163.00 pm   
25
176.00 pm   
18

Covalent Radius
200.00 pm   
11
189.00 pm   
19

Van der Waals Radius
243.00 pm   
11
Not Available   

Atomic Weight
231.04 amu   
24
167.26 amu   
99+

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

Adjacent Atomic Numbers
  
  

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Thorium
  
Holmium
  

Next Element
Uranium
  
Thulium
  

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

Lattice Constant
392.50 pm   
23
355.88 pm   
39

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

Lattice C/A Ratio
Not Available   
1.57   
17

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