Why does magnesium ribbon gives off light when we burn its tip ??
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Magnesium (Mg) + Oxygen (O2) → Magnesium oxide (MgO)
The hot magnesium supplies enough energy for oxygen molecules to split up, breaking the very strong O=O double bond. Each magnesium atom gives two electrons to an oxygen atom, so magnesium oxide is made of magnesium ions, Mg2+, and oxide, O2– ions.
You’ll notice I said mainly MgO. Magnesium burns so vigorously that there is even enough energy to break the even stronger N–N triple bond in molecules of nitrogen and form magnesium nitride, formula Mg3N2, which is made of magnesium ions, Mg2+, and nitride, N3– ions.
To make pure MgO, one way is to burn magnesium ribbon in pure oxygen, but metallic magnesium is quite expensive. A better and cheaper way is to heat magnesium carbonate or magnesium nitrate until they decompose.
The hot magnesium supplies enough energy for oxygen molecules to split up, breaking the very strong O=O double bond. Each magnesium atom gives two electrons to an oxygen atom, so magnesium oxide is made of magnesium ions, Mg2+, and oxide, O2– ions.
You’ll notice I said mainly MgO. Magnesium burns so vigorously that there is even enough energy to break the even stronger N–N triple bond in molecules of nitrogen and form magnesium nitride, formula Mg3N2, which is made of magnesium ions, Mg2+, and nitride, N3– ions.
To make pure MgO, one way is to burn magnesium ribbon in pure oxygen, but metallic magnesium is quite expensive. A better and cheaper way is to heat magnesium carbonate or magnesium nitrate until they decompose.
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