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arsenic - History

How did Johann Schroeder prepare elemental arsenic in 1649?

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A labeled diagram of the periodic table entry for arsenic, showing its atomic number 33, symbol As, atomic weight 74.921595, electron configuration, and classification as an other nonmetal. Additional icons indicate arsenic is solid at room temperature, has a rhombohedral crystal structure, and weakly acidic oxides. — arsenic Properties of arsenic.

In 1649, the German pharmacist Johann Schroeder provided the first clearly authentic report of the preparation of elemental arsenic. He successfully isolated the substance by heating its oxide with charcoal.1