Which Happened First?

Discovery of xenon

Discovery of xenon
Image: User:Pslawinski · CC BY-SA 2.5 · source

Xenon is a chemical element; it has symbol Xe and atomic number 54. It is a dense, colorless, odorless noble gas found in Earth's atmosphere in trace amounts.

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

Which happened first?

Timeline

  1. Discovery of krypton1898
  2. Discovery of neon1898
  3. Discovery of polonium1898
  4. Discovery of radium1898
  5. Discovery of xenon (this page)July 12, 1898
  6. Discovery of actinium1899

Related

Play a round with Science · 19th century
Discovery of xenon (July 12, 1898) · Which Happened First?