# Covalent vs Ionic bond in Silicon dioxide

I was wondering why silicon dioxide tends to be a covalent bond instead of an ionic bond. Based on lewis structures, the octet rule seems to work for silicon dioxide so shouldn't it also be an ionic bond?

• Losing four electrons to form a $\ce{Si^{4+}}$ is quite unlikely and requires a lot of energy to do so. – Pritt says Reinstate Monica Mar 30 '18 at 5:38
• How does covalent bonding require less energy? – ChemPsycho Mar 30 '18 at 15:55