Question

What happens when a magnesium ribbon is heated in presence of air ?
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Answer 1

Answer:

when magnesium ribbon Is heated in presence of air (Oxygen) it burns with a dazzling white flame and it results in white ash which is magnesium oxide (MgO).

2Mg +O•2------2MgO.

Answer 2

Answer:

When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide. ... 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