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Atomic Structure of Einsteinium and Actinium


Atomic Structure of Actinium and Einsteinium


Atomic

Atomic Number
99  
19
89  
29

Electron Configuration
[Rn] 5f11 7s2  
[Rn] 6d1 7s2  

Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  

Crystal Lattice
FCC-Crystal-Structure-of-Einsteinium.jpg#100  
FCC-Crystal-Structure-of-Actinium.jpg#100  

Atom
  
  

Number of Protons
99  
19
89  
29

Number of Neutrons
153  
10
138  
17

Number of Electrons
99  
19
89  
29

Radius of an Atom
  
  

Atomic Radius
186.00 pm  
11
195.00 pm  
9

Covalent Radius
186.00 pm  
21
186.00 pm  
21

Van der Waals Radius
0.00 pm  
99+
215.00 pm  
31

Atomic Weight
252.00 amu  
16
227.00 amu  
25

Atomic Volume
17.04 cm3/mol  
99+
22.54 cm3/mol  
20

Adjacent Atomic Numbers
  
  

Previous Element
Radium
  

Next Element
Fermium
  
Thorium
  

Valence Electron Potential
0.00 (-eV)  
99+
38.60 (-eV)  
99+

Lattice Constant
582.00 pm  
8
567.00 pm  
9

Lattice Angles
-  
π/2, π/2, π/2  

Lattice C/A Ratio
1.29  
99+
1.89  
2

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