Which Happened First?

Discovery of praseodymium

Discovery of praseodymium
Image: The original uploader was Tomihahndorf at German Wikipedia. · CC BY-SA 3.0 · source

Praseodymium is a chemical element; it has symbol Pr and atomic number 59. It is the third member of the lanthanide series and is considered one of the rare-earth metals. It is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Which happened first?

Timeline

  1. Discovery of thorium1828
  2. Discovery of lanthanumJanuary 1839
  3. Discovery of praseodymium (this page)1841
  4. Discovery of erbium1843
  5. Discovery of terbium1843
  6. Discovery of ruthenium1844

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Discovery of praseodymium (1841) · Which Happened First?