Contemporaries
Dmitri Mendeleev
Chemistry · periodic law
Show on the timeline- Period of activity shown
- 1856–1907
A chemist and teacher who formulated the periodic law and presented his system of chemical elements in 1869. By leaving spaces for undiscovered elements, he predicted properties that later discoveries confirmed. He taught at St Petersburg University and wrote influential textbooks. His classification became the foundation of the modern periodic table, subsequently refined through advances in understanding atomic structure.
- Life
- 1834–1907
- Timeline period
- 1856–1907: from his master’s dissertation to his death
- Key work
- Periodic system of chemical elements, 1869