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Atomic Structure of Beryllium and Technetium

Beryllium
Technetium
Atomic Structure of Technetium and Beryllium


Atomic
Atomic Number
4  
99+
43  
99+
Electron Configuration
[He] 2s2  
[Kr] 4d5 5s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Beryllium.jpg#100  
HCP-Crystal-Structure-of-Technetium.jpg#100  
Atom
  
  
Number of Protons
4  
99+
43  
99+
Number of Neutrons
5  
99+
55  
99+
Number of Electrons
4  
99+
43  
99+
Radius of an Atom
  
  
Atomic Radius
112.00 pm  
99+
136.00 pm  
99+
Covalent Radius
96.00 pm  
99+
147.00 pm  
39
Van der Waals Radius
153.00 pm  
99+
200.00 pm  
35
Atomic Weight
9.01 amu  
99+
98.00 amu  
99+
Atomic Volume
5.00 cm3/mol  
99+
8.50 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Lithium
  
Molybdenum
  
Next Element
Sodium
  
Ruthenium
  
Valence Electron Potential
82.00 (-eV)  
15
180.00 (-eV)  
3
Lattice Constant
228.58 pm  
99+
273.50 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.57  
99+
1.60  
21
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