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Periodic Table

Picture of  Selenium
 
 

 Atomic No. Order:
[Picture]

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Selenium  
Ground State Electron Configuration of  Selenium
Symbol: Se
Atomic Number: 34
Atomicmass: 78.96 g.mol -1
Electronegative (According to Pauling): 2.4
Density: 4.79 g.cm-3 at 20°C
Melting Point: 217 °C
Boiling Point: 688 °C
Venderwaals Radius: 0.14 nm
Ionic Radius: 0.198 nm (-2) ; 0.042 nm (+6)
Isotopes: 9
Electronic Shell: [ Ar ] 3d10, 4s2, 4p4
Energy Of First Ionization: 940,7 kJ.mol -1  

34

No of Protons
Standard Potential: - 0.77 V

Electron in Full Shell
Discoverd By: Discovered by Jons Berzelius in 1817

Electron in Partial Shell
   
 
 

 
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