Which Happened First?

Discovery of thulium

Discovery of thulium
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Thulium is a chemical element; it has symbol Tm and atomic number 69. It is the thirteenth element in the lanthanide series of metals. It is the second-least abundant lanthanide in the Earth's crust, after radioactively unstable promethium. It is an easily workable metal with a bright silvery-gray luster.

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Which happened first?

Timeline

  1. Discovery of holmium1878
  2. Discovery of ytterbium1878
  3. Discovery of samarium1879
  4. Discovery of scandium1879
  5. Discovery of thulium (this page)1879
  6. Discovery of gadolinium1880

Related

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