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Salsk061 [2.6K]
3 years ago
5

Periodic table, chemistry questions

Chemistry
1 answer:
ehidna [41]3 years ago
7 0

Answer:

Explanation:

The Lanthanides were first discovered in 1787 when a unusual black mineral was found in Ytterby, Sweden. This mineral, now known as Gadolinite, was later separated into the various Lanthanide elements. In 1794, Professor Gadolin obtained yttria, an impure form of yttrium oxide, from the mineral.

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