The discovery of the periodic table of the chemical elements

150 years ago, in 1869, D. I. Mendeleev and L. Meyer independently published their ideas on the arrangement of the chemical elements in a periodic system. The United Nations and UNESCO therefore declared 2019 the "International Year of the Periodic Table". The question arises, what is so special about this "simple table"? Join the author on a short journey to the history of the periodic table. Learn about its predecessors and look at how the periodic table of elements has evolved over the y ...