When iron (Fe) and chromium (Cr) burn, they react with oxygen (O₂

When iron (Fe) and chromium (Cr) burn, they react with oxygen (O₂) to form metal oxides. These reactions release energy, often with sparks and bright light. Here’s how it looks:

Iron:
When iron burns, it reacts with oxygen to form iron(III) oxide (Fe₂O₃).
Reaction: 4Fe + 3O₂ → 2Fe₂O₃

Chromium:
When chromium burns, it reacts with oxygen to form chromium(III) oxide (Cr₂O₃).
Reaction: 4Cr + 3O₂ → 2Cr₂O₃

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