Write the formulas for silicon dioxide.

Note: it says formulas

SiO2 i guess is a formula but idk how to write formulas for it.

Simply reduce Si2O4 by dividing both subscripts by 2. That will get you SiO2. Silicon dioxide is held together by double, covalent bonds.

Si(s)+ 2O(g)=SiO2

To write the formula for silicon dioxide, you need to understand the chemical symbols and their valencies (number of bonds they can form). In silicon dioxide, silicon (Si) and oxygen (O) are the elements involved.

The valence of silicon is +4, meaning it can form four bonds, while the valence of oxygen is -2, indicating it can form two bonds. To write the formula, you need to balance the valencies of the two elements involved.

Since silicon has a valence of +4 and oxygen has a valence of -2, two oxygen atoms are required to balance the valency of one silicon atom. Therefore, the formula for silicon dioxide is SiO2.