Drag the tiles to the correct boxes to complete the pairs.
Chromium is a transition metal, and oxygen has an oxidation number of -2. Use this information to match each compound to its chemical formula.
![Drag the tiles to the correct boxes to complete the pairs Chromium is a transition metal and oxygen has an oxidation number of 2 Use this information to match e class=](https://us-static.z-dn.net/files/df2/391f685118734217a1156ae65c1cc31c.png)