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Atomic Structure of Beryllium and Protactinium

Beryllium
Protactinium
Atomic Structure of Protactinium and Beryllium


Atomic
Atomic Number
4  
99+
91  
27
Electron Configuration
[He] 2s2  
[Rn] 5f2 6d1 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Tetragonal (TETR)  
Crystal Lattice
HCP-Crystal-Structure-of-Beryllium.jpg#100  
TETR-Crystal-Structure-of-Protactinium.jpg#100  
Atom
  
  
Number of Protons
4  
99+
91  
27
Number of Neutrons
5  
99+
122  
22
Number of Electrons
4  
99+
91  
27
Radius of an Atom
  
  
Atomic Radius
112.00 pm  
99+
163.00 pm  
27
Covalent Radius
96.00 pm  
99+
200.00 pm  
11
Van der Waals Radius
153.00 pm  
99+
243.00 pm  
15
Atomic Weight
9.01 amu  
99+
231.04 amu  
24
Atomic Volume
5.00 cm3/mol  
99+
15.00 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Lithium
  
Thorium
  
Next Element
Sodium
  
Uranium
  
Valence Electron Potential
82.00 (-eV)  
15
92.00 (-eV)  
11
Lattice Constant
228.58 pm  
99+
392.50 pm  
26
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
99+
1.58  
36
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