# What is the charge of Silicon dioxide? [closed]

What is the charge of Silicon dioxide ions? I can't find it anywhere.

It seems to be 0?

Also is there anywhere I can find these on my own?

• I'm not even sure what the question is. Usually one talks about a formal charge on a particular atom. Worse, $\ce{SiO2}$ isn't an isolated molecule - it's a network solid. (Actually, it's many types of network solids.) – Geoff Hutchison Oct 2 '14 at 2:12
• @GeoffHutchison Sorry I meant the ions – Integral Oct 2 '14 at 2:16
• @GeoffHutchison Also side question, what is more common Fe2 or Fe3? – Integral Oct 2 '14 at 2:29
• Please try to ask separate questions as separate questions, not in the comments. – Geoff Hutchison Oct 2 '14 at 2:46
• @Thursday SiO2 isn't an ionic substance. Each individual unit is polar, though, if that's what you're asking. – Shafter Oct 2 '14 at 3:08

$\ce{SiO2}$ is not an ion. It is a network solid. Its net charge is zero.
From charge balance, since oxygen holds a -2 formal charge, then silicon must hold a +4 formal charge in order to balance out. $(+4) + (+2 \times -2) = 0$