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Reactions of the Period 3 elements
Member rating: No Rating | Words: 1153 | Submitted: Tue Jan 08 2008
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Reactions of the Period 3 elements In this essay, I would like to describe the reactions of the Period 3 elements from sodium to argon with water, oxygen and chlorine. Reactions with water For sodium, sodium has a very exothermic reaction with cold water producing hydrogen and a colourless solution of sodium hydroxide. For magnesium, magnesium has a very slight reaction with cold water, but burns in steam. A very clean coil of magnesium dropped into cold water eventually gets covered in small bubbles of hydrogen which float it to the surface. Magnesium hydroxide is formed as a very thin layer on the magnesium and this tends to stop the reaction. Magnesium burns in steam with its typical white flame to produce white magnesium oxide and hydrogen. If you are heating the magnesium in a glass tube, the magnesium also reacts with the glass. That leaves dark grey products (including silicon and perhaps boron from the glass)...
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