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Atomic Structure of Protactinium and Europium

Protactinium
Europium
Atomic Structure of Europium and Protactinium


Atomic Properties
Atomic Number
91   
27
63   
99+
Electron Configuration
[Rn] 5f2 6d1 7s2   
[Xe] 4f7 6s2   
Crystal Structure
Tetragonal (TETR)   
Body Centered Cubic (BCC)   
Crystal Lattice
TETR-Crystal-Structure-of-Protactinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
91   
27
63   
99+
Number of Neutrons
122   
21
89   
38
Number of Electrons
91   
27
63   
99+
Radius of an Atom
  
  
Atomic Radius
163.00 pm   
25
180.00 pm   
14
Covalent Radius
200.00 pm   
11
198.00 pm   
13
Van der Waals Radius
243.00 pm   
11
233.00 pm   
18
Atomic Weight
231.04 amu   
24
151.96 amu   
99+
Atomic Volume
15.00 cm3/mol   
34
28.90 cm3/mol   
8
Adjacent Atomic Numbers
  
  
Previous Element
Thorium
  
Samarium
  
Next Element
Uranium
  
Gadolinium
  
Valence Electron Potential
92.00 (-eV)   
11
45.60 (-eV)   
35
Lattice Constant
392.50 pm   
23
458.10 pm   
17
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
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