# Is silicon dioxide a polar molecule or not?

Is $$\ce{SiO2}$$ is a polar molecule or not? The difference in electronegativity between the two atoms is 1.7.

I read that $$\ce{SiO2}$$ doesn't exist as a single molecule in which the silicon atom is connected to four oxygen atoms. Can I consider it polar?

$$\ce{SiO2}$$ doesn't exist as a molecule rather exists as network of $$\ce{Si}$$ and $$\ce{O}$$ bonds with $$\ce{Si}$$ bonded to four $$\ce{O}$$ atoms. $$\ce{SiO2}$$ simply denotes their ratio in the complete structure. $$\ce{Si-O}$$ bonds are very polar but there are four $$\ce{Si-O}$$ bonds which cancel the dipole, making the structure as a whole, non-polar.