Question

If we keep a magnesium ribbon in air, which contains oxygen, why does it not form magnesium oxide?
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Answer 1

When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide. A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium combine in a chemical reaction to form this compound.

But here since the magnesium ribbon is not ignited therefore it will not react to the oxygen present in the air and hence it will not form magnesium oxide

Answer 2

Answer:

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When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide. A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium combine in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction as well as combination reaction.

2Mg(s)+O 2(g)→2MgO(s)+energy