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

Answer:

The element with the electron configuration of 1s2 2s2 2p6 3s2 3p4 has six valence electrons.But it has totally 16 electrons.

Explanation:

Given, 1s2 2s2 2p6 3s2 3p4

At first,find out the Valence shell.Here, the third shell is the valence shell 3s23p4.We know that the electrons in valence shell are called valence electrons.Here we get six valence electrons in 3s23p4.That is why the element with the electron configuration of 1s2 2s2 2p6 3s2 3p4 has six valence electrons.