2019 International Year of the Periodic Table Timeline of Elements

Timeline of Elements poster.

The Periodic Table represents more than 5,000 years of human discovery. We marked the 2019 International Year of the Periodic Table with a worldwide collaboration that chronicles this amazing story in a timeline illustrated by students from 118 schools in 28 countries. 

Learn about the discovery of the elements through eight time periods, as we explore the challenges and breakthroughs that eventually contributed to creating the modern form of the Periodic Table 150 years ago.

  1. The Ancients and the Alchemists (BCE-1734)
  2. The Miners (1735-1804)
  3. The True Elements (1765-1774)
  4. Davy’s Elements (1805-1824)
  5. Berzelius’ World (1815-1844)
  6. Spectroscopy (1855-1864)
  7. The Periodic Table (1865-1934)
  8. The Radioactive Elements (1935-2019)