Discovery of Ytterbium
Ytterbium, atomic number 70, has a mass of 173.054 au.
Ytterbium was first observed or predicted in 1878 by J.C.G. de Marignac and first isolated in 1906 by C. A. von Welsbach. It took about 80 years to split the rare earths metal ores, the ceria & yttria, into the pure metals. See the timeline here.
|Periodic Table, What is it showing?||
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