Word: ytterbium
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Dates: during 1926-1926
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...individuals by hypothetical count. He had them all assembled in the university's rare earths laboratory, and his procedure was to isolate them one by one, scrutinize them closely, and put them to one side positively identified as Oxygen, Gold, Barium, Chlorine, etc., etc.-old friends-or as Ytterbium, Lutecium, Praseodymium, etc., etc.-individuals that are rarely seen and have been introduced to science comparatively recently...
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