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01-10-2020
Chemistry

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If the unknown elements on the periodic table are "unknown" how did they end up in the periodic table in the first place? thinking emoji face

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09-10-2020

Answer:

The periodic table is a marvel of organization, with each column and each row showing all ... Scientists identified the rest of them in the first half of the 20th century. ... They created in their lab a synthetic, previously unknown element. ... The Berkeley scientists did this for weeks on end, and produced a tiny amount of curium.

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