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Atomic Structure of Actinium and Einsteinium

Actinium
Einsteinium
Atomic Structure of Einsteinium and Actinium


Atomic
Atomic Number
89  
29
99  
19
Electron Configuration
[Rn] 6d1 7s2  
[Rn] 5f11 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100  
FCC-Crystal-Structure-of-Einsteinium.jpg#100  
Atom
  
  
Number of Protons
89  
29
99  
19
Number of Neutrons
138  
17
153  
10
Number of Electrons
89  
29
99  
19
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
9
186.00 pm  
11
Covalent Radius
186.00 pm  
21
186.00 pm  
21
Van der Waals Radius
215.00 pm  
31
0.00 pm  
99+
Atomic Weight
227.00 amu  
25
252.00 amu  
16
Atomic Volume
22.54 cm3/mol  
20
17.04 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Californium
  
Next Element
Thorium
  
Fermium
  
Valence Electron Potential
38.60 (-eV)  
99+
0.00 (-eV)  
99+
Lattice Constant
567.00 pm  
9
582.00 pm  
8
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.89  
2
1.29  
99+
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