Question

In the Lewis dot structure for SiO2, how many total valence electrons are there in the entire molecule, including the ones used to form bonds?

Answer 1

16 valence electrons

Step-by-step explanation:

Valence electron is the number of electrons that lies in the outermost orbit of an atom. Si lies in group 4 of the periodic table and O lies in group 6 of the periodic table.

In SiO₂ there is one atom of Si and two atoms of O. The valence electron in Si is 4 and the valence electron in O is also 6. The total number of valence electron is

4 + (6 x 2) = 16

Answer 2

Step-by-step explanation:

The total valence electrons present in
`SiO_(2)` molecule are as follows.

Valency of Si + (Valency of oxygen × number of oxygen atoms)

= 4 + (6 × 2)

= 4 + 12

= 16

Therefore, there are total 16 valence electrons in
`SiO_(2)` molecule including the ones used to form bonds.