Homework Answers
The Electron configuration of 1S22S22P63S2 belongs to Magnesium element (Mg).
Electronic congiguration can also be written as [ Ne ]3S2
Since Neon Ne has configuration completed with 1S22S22P6 a noble gas , we use to denote Ne and other remaining elements to specify the other elements
The last filled electrons of oribal of Mg is 3S and there are two electrons
So, n = 3 , [energy level is 3s]
l = 0 , [for s oribtal , l =0 ,{-1+1=0}]
s = 1/2
the quantum number is n=3, l=0,s=1/2.
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