Zinc (zinc) is a light gray transition metal and the fourth "common" metal. In modern industry, zinc is irreplaceable in battery manufacturing. Zinc is not easy to burn in air, but it will emit strong white light in oxygen.
There is a layer of zinc oxide on the surface of zinc, which emits white smoke when burning. The main component of white smoke is zinc oxide, which not only blocks the combustion of zinc, but also refracts the color of flame and forms pale light.
Zinc is easily soluble in acid, and gold, silver and copper are easily displaced from the solution. The oxide film of zinc has a high melting point, but the melting point of metallic zinc is very low. Therefore, if the zinc sheet is heated on an alcohol lamp, it will melt and soften, but it will not fall off, precisely because of the role of the oxide film. Zinc is mainly used in steel, metallurgy, machinery, electric power, chemical industry, light industry, military and medicine.