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Магний и иридий, самый лёгкий и самый тяжелый металлы, которые ещё можно без особых предосторожностей держать дома. Оба образца весят по 5 грамм. Июль 2015.
Magnesium and Iridium -- the least and the most dense metals that are safe to keep home. Despite a difference in sizes, both samples on this picture are of the same 5 gram weight. July 2015.
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