【】 1s2 2s2 2p6 3s2 3p2 valence electrons ||How many valence electrons are there in 1s2 2s2 2p6 3s2 3p2 ?

 How many valence electrons does 1s2 2s2 2p6 3s2 3p2 have?

Answer:

To find out valence electrons from 1s2 2s2 2p6 3s2 3p2,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 3p2,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 3p2 .

If I add all the valence electrons,we get 2 + 2 = 4 valence electrons in 1s2 2s2 2p6 3s2 3p2.

From 1s2 2s2 2p6 3s2 3p2, we get totally 14 electrons.Among these 14 electrons, only 4 electrons are called valence electrons that are situated in the outermost shell (3s2 3p2).

1s2 2s2 2p6 3s2 3p2 is the electron configuration of silicon.

Next