Earth (historical chemistry)
id:
earth-historical-chemistry-177-565015
title:
Earth (historical chemistry)
text:
Earths were defined by the Ancient Greeks as "materials that could not be changed further by the sources of heat then available". Several oxides were thought to be earths, such as aluminum oxide and magnesium oxide. It was not discovered until 1808 that these weren't elements but metallic oxides.
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Earth_(historical_chemistry)
date created:
2004-09-17T06:27:31Z
date modified:
2024-09-03T22:25:15Z
main entity:
{"identifier":"Q3820332","url":"https://www.wikidata.org/entity/Q3820332"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/5/55/Rareearthoxides.jpg","width":1200,"height":780}
fields total:
13
integrity:
15