The chemical formula of zinc is Zn and the chemical formula of aluminum is al.
The appearance of zinc is silvery white, which plays an indelible role in modern industrial battery manufacturing and is a very important metal. (such as chemically made copper-zinc primary battery)
Zinc is used to make zinc-aluminum alloy, hot dip plating of steel products, electro-zinc plating, cathode plate of manganese-zinc dry battery, anode protection of underwater equipment, alloy tinplate and brass.
Aluminum is a silvery white light metal. It has plasticity. Commodities are often made into bars, sheets, foils, powders, tapes and wires. An oxide film can be formed in humid air to prevent metal corrosion (protect internal metal, such as a thermos cup).
Supersonic aircraft is composed of about 70% aluminum and its aluminum alloy. Aluminum is also widely used in shipbuilding, and the amount of aluminum used in a large passenger ship often reaches several thousand tons.
The conductivity of aluminum is second only to that of silver, copper and gold. Although its conductivity is only 2/3 of that of copper, its density is only13 of that of copper, so the quality of aluminum wire is only half that of copper wire when transmitting the same amount of electricity. Aluminum foil paper embodies the ductility of aluminum.
Why does the landlord ask such a question? If you look carefully, it is because the chemical properties of these two metals are indeed similar, but their physical properties and uses are still very different: the mass difference between aluminum and zinc per unit volume is about double digits, so when you want to make light things (such as airplanes, which have small mass to reduce air resistance), you need aluminum; The sound of zinc is dull, and the sound of aluminum is crisp; Compared with aluminum, zinc tends to darken.
Of course, in order to combine the advantages of the two materials, zinc-aluminum alloy was invented. The advantages of this alloy are high hardness, good heat resistance (sometimes reduced) and corrosion resistance.