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Atomic Structure of Protactinium and Yttrium

Protactinium
Yttrium
Atomic Structure of Yttrium and Protactinium


Atomic Properties
Atomic Number
91   
27
39   
99+
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Kr] 4d1 5s2   
Crystal Structure
Tetragonal (TETR)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
HCP-Crystal-Structure-of-Yttrium.jpg#100   
Atom
  
  
Number of Protons
91   
27
39   
99+
Number of Neutrons
122   
21
50   
99+
Number of Electrons
91   
27
39   
99+
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
180.00 pm   
14
Covalent Radius
200.00 pm   
11
190.00 pm   
18
Van der Waals Radius
243.00 pm   
11
200.00 pm   
28
Atomic Weight
231.04 amu   
24
88.91 amu   
99+
Atomic Volume
15.00 cm3/mol   
34
19.80 cm3/mol   
21
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Strontium
  
Next Element
Uranium
  
Zirconium
  
Valence Electron Potential
92.00 (-eV)   
11
48.00 (-eV)   
30
Lattice Constant
392.50 pm   
23
364.74 pm   
31
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.57   
16
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