【】 1s2 2s2 2p6 3s2 3p4 valence electrons ||How many valence electrons are there in 1s2 2s2 2p6 3s2 3p4 ?

 How many valence electrons does 1s2 2s2 2p6 3s2 3p4 have?



Answer:

To find out valence electrons from the electron configuration 1s2 2s2 2p6 3s2 3p4,we will do the following steps:

    
              Step-1:

We need to identify valence shell by the principal quantum number (n)of highest value.

From 1s2 2s2 2p6 3s2 3p4,the highest value of n is 3.

So, third shell is the valence shell and the electrons in 3rd shell is called valence electrons.

                      Step-2:
Now we need to add all the valence electrons.

In 3rd shell,we are getting 3s2 3p4 .

If I add all the valence electrons,we get 2 + 4 = 6 valence electrons in 1s2 2s2 2p6 3s2 3p4.


【】 1s2 2s2 2p6 3s2 3p4 valence electrons ||How many valence electrons are there in 1s2 2s2 2p6 3s2 3p4 ?





From 1s2 2s2 2p6 3s2 3p4, we get totally 16 electrons.Among these 16 electrons, only 6 electrons are called valence electrons that are situated in the outermost shell (3s2 3p4).

1s2 2s2 2p6 3s2 3p4 is the electron configuration of sulphur.





 

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