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Germanium, tin, lead As is known, there are 118 elements in the periodic table. There is no data on nine of them, who and how they were discovered, since they have been known in the form of simple substances since prehistoric times. Germanium, tin and lead are located in the 14th group, where the most unique elements in their properties are gathered. This is explained by the fact that they are on the border of metals and non-metals and are capable of exhibiting the properties of both. Alexander Ivanov will analyze the unusual properties of these chemical elements. #chemistry #experiment #experiments