Question

magnesium wire is burnt in air​

Answer 1

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When magnesium ribbon is burnt in the presence oxygen, calcium oxide is formed.

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Answer 2

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 magnesiumcombine in a chemical reaction to form this compound.