What is the oxidation number of each element in the compound SiO2 (sand)?

2 Answers
Nov 6, 2015

Answer:

Si: +4 O:-2

Explanation:

The oxidation of oxygen is always -2, and since there are two of them, you get -4. That means that Si has to be +4 to balance

Nov 6, 2015

Answer:

Oxidation number is the charge left on the central atom when all the bonding pairs are taken away, with the charge going to the most electronegative atom.

Explanation:

The sum of the oxidation equals the charge on the "molecule"; oxygen usually has an oxidation number of #-II#, and it does here. Thus #Si_(ON) - 2 -2 =0#. So what is #Si_(ON)#?