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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 mat class=

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That so so hard man

Answer:

I think the answer is in the picture

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