Английская Википедия:Earth (historical chemistry)

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Шаблон:Use dmy dates Earths were defined by the Ancient Greeks as "materials that could not be changed further by the sources of heat then available".[1] Several oxides were thought to be earths, such as aluminum oxide and magnesium oxide.[1] It was not discovered until 1808 that these weren't elements but metallic oxides.[1][2]

See also

References

Шаблон:Wikiquote Шаблон:Reflist


Шаблон:Chem-hist-stub