The essence of the combustion process was discovered in 1756 by the great Russian scientist M.V. Lomonosov. With his experiments, he proved that combustion is a chemical reaction of a compound of a combustible substance with atmospheric oxygen. Therefore, in order for the combustion process to proceed, the following conditions are necessary:
• the presence of a combustible substance (a substance that can burn after removing the source of ignition);
• the presence of an oxidizing agent (usually the oxidizing agent during the combustion of substances is atmospheric oxygen; oxidizing agents can also be chemical compounds containing oxygen in the composition of molecules: nitrate, perchlorates, nitric acid, nitrogen oxides, and some chemical elements – fluorine, bromine, chlorine);
• the presence of an ignition source (open flame of a candle, match, lighter, bonfire or spark).
It follows that the combustion process can be stopped if one of the listed conditions is excluded from it.
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