its 40
I just took the test right now to get this answer
Answer:
O.
Explanation:
- The element which is oxidized is the element that losses electrons and its oxidation state be more positive.
- The element which is reduced is the element that gain electrons and its oxidation state be more negative.
<em> O goes from 0 to -2, so, it is the element that is reduced.</em>
Answer:
one of the atoms sharing electrons is more electronegative than the other atom
Explanation:
A chemical reaction happens when the atoms or molecules rearrange to form a new substance