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Earth

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  1. The chemical term earths was historically applied to certain chemical substances, once thought to be elements, and this name was borrowed from one of the four classical elements of Plato. "Earths" later turned out to be chemical compounds, albeit dif

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on January 5, 2009
  2. a class of elements or compounds (rare earth)

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on January 5, 2009
  3. Actually, earths are metallic oxides, and the corresponding metals were classified into the corresponding groups: rare earth metals and alkaline earth metals

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on January 5, 2009
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