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Atomic Structure of Protactinium and Beryllium


Atomic Structure of Beryllium and Protactinium


Atomic Properties

Atomic Number
91   
27
4   
99+

Electron Configuration
[Rn] 5f2 6d1 7s2   
[He] 2s2   

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

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

Atom
  
  

Number of Protons
91   
27
4   
99+

Number of Neutrons
122   
21
5   
99+

Number of Electrons
91   
27
4   
99+

Radius of an Atom
  
  

Atomic Radius
163.00 pm   
25
112.00 pm   
99+

Covalent Radius
200.00 pm   
11
96.00 pm   
99+

Van der Waals Radius
243.00 pm   
11
153.00 pm   
99+

Atomic Weight
231.04 amu   
24
9.01 amu   
99+

Atomic Volume
15.00 cm3/mol   
34
5.00 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Thorium
  
Lithium
  

Next Element
Uranium
  
Sodium
  

Valence Electron Potential
92.00 (-eV)   
11
82.00 (-eV)   
15

Lattice Constant
392.50 pm   
23
228.58 pm   
99+

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

Lattice C/A Ratio
Not Available   
1.57   
18

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