How to check the chemical composition of a metal product such as a nail.

You can check in various ways, for example: 1) check for magnetism (ferromagnets have this property pronouncedly (cobalt, iron, nickel)); 2) chemical testing (analytical testing) – testing for reactions with acids or other elements; 3) by the properties of substances (magnetism is included in this category). 4) by the density of the substance – we determine the mass and volume, and divide the mass by the volume, the outgoing value will be the density, and by it we will look for the substance in the table of the densities of substances, we will take the closest one, because the error is frequent. etc.