How many valence

electrons does the

element with the

electron configuration

of 1s2 2s2 2p6 3s2 have?

Answer:

The element with the electron configuration of 1s2 2s2 2p6 3s2 has two Valence Electrons.

Explanation:

Given, 1s2 2s2 2p6 3s2

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