This is because magnesium reacts with oxygen in air to form white coloured magnesium oxide.
Question
Why does a magnesium ribbon burn with a dazzling white flame?
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If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. a. Do you think rust is different from iron? b. Can you change rust back into iron by some simple methods? c. Do you think formation of rust from iron is a chemical change? d. Give two other examples of a similar type of change.
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