Fireworks are actually similar in structure to firecrackers, and they all contain black powder and medicine. In order to achieve good performance, fireworks and fireworks bombs are filled with a lot of gunpowder for launching and explosion. For example, a fireworks bomb with a diameter of 20 cm will explode only when it rises to a height of about 200 meters after launch, and the radius covered by these points can be about 80 meters.

In the process of making fireworks, some luminescent agents and chromophores are added to make the fireworks emit colorful colors. The luminescent agent is powder of metallic magnesium or metallic aluminum. These metals give off incandescent light when they burn. Chromophores are actually just some metal compounds.

Metal compounds contain metal ions. When these metal ions react violently with oxygen molecules, you will see the compound burn and emit a unique flame color.

In order to protect the environment, many fireworks and firecrackers do not use substances containing heavy metals and sulfur elements, thus reducing the production of sulfur dioxide and other sulfides. Secondly, the consumption of metal powder is reduced, and organic matter is basically used as combustible, thus reducing the inhalable particulate matter produced after the combustion of metal powder. The third is to change the oxygen balance and combustion temperature of the system by changing the amount of oxidant and combustible, and control the combustion reaction.

In fact, it is similar to firecrackers, and its structure contains black powder and medicine. After the fireworks are lit, a chemical reaction similar to the above causes an explosion, and most of the energy released during the explosion is converted into light energy. Adding some luminescent coloring agents in the process of making fireworks can make fireworks emit colorful colors.

Fireworks are made of this property of metal. Fireworks makers skillfully arrange and decide the order of burning. In this way, after the fireworks are detonated, bright and colorful patterns can bloom in the dark sky, which is often called flame reaction in middle schools.

Different kinds of metal compounds will emit different colors of light when burning. Both sodium chloride and sodium sulfate belong to sodium compounds, which will emit a golden flame when burned. Similarly, calcium nitrate and calcium carbonate will also emit brick-red flames when burning. In chemistry, the above results are often used to test the metals contained in substances. This kind of experiment is called flame color test?