How would you find the oxidation numbers of MgO?

1 Answer

Answer:

In the compound

#"O=-2 and Mg=+2"#

Explanation:

There is a general rule that the sum of
the oxidation numbers for a pure compound is always zero

There rule for oxygen which states that the oxidation number
always equals -2 in compounds , except in peroxides

So #(-2)+("oxidation number of Mg")=0#

#rArr-2+2=0#

So, the oxidation number for #"O"=-2# and #"Mg"=+2#