【 】 1s2 2s2 2p6 3s2 ||What is 1s2 2s2 2p6 3s2 ?||What element has the electron configuration of 1s2 2s2 2p6 3s2 ?

 What is 1s2 2s2 2p6 3s2 ?


Answer:

1s2 2s2 2p6 3s2  means that 

●s subshell of first orbit or energy level has two electrons,

●s subshell of second orbit or energy level has two electrons,  

●p subshell of second orbit or energy level has six electrons,

●s subshell of third orbit or energy level has two electrons.



Read:CO2 Lewis Structure



From 1s2 2s2 2p6 3s2 

electron configuration,we get 2+2+6+2  = 12 electrons.


We know that electron's number is equal to proton number or atomic number for neutral atom.

Since here there is no words about charge,we can say that 1s2 2s2 2p6 3s2  indicates the element whose atomic number is 12.


Now if you look at the periodic table,Mg  (Magnesium) has atomic number 12.







So 1s2 2s2 2p6 3s2  is the electron configuration of Mg  (Magnesium) .



 1s2 2s2 2p6 3s2 ?


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1s2 2s2 2p6 3s2


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